diff --git a/BeWoPlanerMobil/App_Start/FilterConfig.cs b/BeWoPlanerMobil/App_Start/FilterConfig.cs
index 8ed3f537b..de3e82ae3 100644
--- a/BeWoPlanerMobil/App_Start/FilterConfig.cs
+++ b/BeWoPlanerMobil/App_Start/FilterConfig.cs
@@ -7,6 +7,21 @@ namespace BeWoPlanerMobil
 		public static void RegisterGlobalFilters(GlobalFilterCollection filters)
 		{
 			filters.Add(new HandleErrorAttribute());
+            filters.Add(new BeWoExceptionFilter());
 		}
 	}
+
+    public class BeWoExceptionFilter : IExceptionFilter
+    {
+        protected static readonly log4net.ILog Log = log4net.LogManager.GetLogger(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
+
+        public void OnException(ExceptionContext filterContext)
+        {
+            var exception = filterContext.Exception;
+
+            Log.Error($"{exception.Message}: {exception.StackTrace}");
+            filterContext.Result = new ViewResult { ViewName = "Error" };
+            
+        }
+    }
 }
\ No newline at end of file
diff --git a/BeWoPlanerMobil/BeWoPlanerMobil.csproj b/BeWoPlanerMobil/BeWoPlanerMobil.csproj
index 7d6b5324d..82f38c36a 100644
--- a/BeWoPlanerMobil/BeWoPlanerMobil.csproj
+++ b/BeWoPlanerMobil/BeWoPlanerMobil.csproj
@@ -409,7 +409,6 @@
     <Content Include="Content\images\bars-black.svg" />
     <Content Include="Content\images\BeWoPlaner.ico" />
     <Content Include="Content\images\bewoplaner_by_ownsoft_logo_mok.png" />
-    <Content Include="Content\images\bewoplaner_logo_big.png" />
     <Content Include="Content\images\calendar-bs-orange.svg" />
     <Content Include="Content\images\interval-finder-icon-v2.svg" />
     <Content Include="Content\images\interval-finder-icon.svg" />
diff --git a/BeWoPlanerMobil/Content/images/bewoplaner_logo_big.png b/BeWoPlanerMobil/Content/images/bewoplaner_logo_big.png
deleted file mode 100644
index a5874eb7a..000000000
Binary files a/BeWoPlanerMobil/Content/images/bewoplaner_logo_big.png and /dev/null differ
diff --git a/BeWoPlanerMobil/Controllers/AbstractBaseController.cs b/BeWoPlanerMobil/Controllers/AbstractBaseController.cs
index 89afc922a..70862f4a8 100644
--- a/BeWoPlanerMobil/Controllers/AbstractBaseController.cs
+++ b/BeWoPlanerMobil/Controllers/AbstractBaseController.cs
@@ -8,7 +8,6 @@ using BeWo.Service.DCEntityMapper;
 using BeWo.Service.ServiceContracts;
 using BeWoPlanerMobil.Models;
 using BeWoPlanerMobil.Service;
-using BeWoPlanerMobil.Util;
 using BS.Shared;
 using BS.Shared.Core;
 using BS.Shared.DataContracts;
@@ -154,5 +153,14 @@ namespace BeWoPlanerMobil.Controllers
         }
 
         public abstract string SaveCollapsibleStatus(bool isOpen, string identifier);
+
+        public ActionResult Error()
+        {
+#if DEBUG
+            ViewBag.ErrorMessage = "[HIER KOMMT DIE FEHLERMELDUNG HIN]";
+#endif
+
+            return View("Error");
+        }
     }
 }
diff --git a/BeWoPlanerMobil/Controllers/DevExpressSchedulerController.cs b/BeWoPlanerMobil/Controllers/DevExpressSchedulerController.cs
index d5efe7300..4a5f6c2a4 100644
--- a/BeWoPlanerMobil/Controllers/DevExpressSchedulerController.cs
+++ b/BeWoPlanerMobil/Controllers/DevExpressSchedulerController.cs
@@ -37,7 +37,7 @@ namespace BeWoPlanerMobil.Controllers
         [Authorize]
         public ActionResult DevExpressScheduler()
         {
-            if(!MobileSessionFacade.IsUserLoggedIn() || Model == null)
+            if(!MobileSessionFacade.IsUserLoggedIn() || Model is null)
             {
                 return RedirectToActionPermanent("Index", "Login");
             }
diff --git a/BeWoPlanerMobil/Controllers/MainController.cs b/BeWoPlanerMobil/Controllers/MainController.cs
index f7d959929..6b2026aa3 100644
--- a/BeWoPlanerMobil/Controllers/MainController.cs
+++ b/BeWoPlanerMobil/Controllers/MainController.cs
@@ -2935,7 +2935,7 @@ namespace BeWoPlanerMobil.Controllers
                             newResult.KannTrotzdemGespeichertWerden = false;
 
                             break;
-                        case Error:
+                        case ServiceRecordValidationResult.Error:
                             newResult.Message += "Beim Speichern ist ein Fehler aufgetreten.<br /><br />";
                             exitLoop = true;
                             newResult.KannTrotzdemGespeichertWerden = false;
diff --git a/BeWoPlanerMobil/Controllers/ReportViewerController.cs b/BeWoPlanerMobil/Controllers/ReportViewerController.cs
index 9d6d543a4..276bcaabc 100644
--- a/BeWoPlanerMobil/Controllers/ReportViewerController.cs
+++ b/BeWoPlanerMobil/Controllers/ReportViewerController.cs
@@ -658,7 +658,7 @@ namespace BeWoPlanerMobil.Controllers
                             Model.SelectedValues.Remove(parameterOid.Value);
                         }
 
-                        break;
+                    break;
                     case QueryParameterType.DateRange:
                         if(textValue != null && textValue.Length == 21 &&textValue.Contains("_"))
                         {
@@ -673,7 +673,7 @@ namespace BeWoPlanerMobil.Controllers
                         {
                             Model.SelectedValues.Remove(parameterOid.Value);
                         }
-                        break;
+                    break;
                     case QueryParameterType.Month:
                         if(!textValue.Contains("_"))
                         {
@@ -689,7 +689,7 @@ namespace BeWoPlanerMobil.Controllers
                             Model.SelectedValues.AddOrUpdate(parameterOid.Value, new SelectedValue(queryParameterType, new DateTime(year, month, 1)));
                         }
 
-                        break;
+                    break;
                     case QueryParameterType.ServiceCategory:
                         if(objectOid is null || objectOid.Value.Equals(0))
                         {
@@ -703,7 +703,7 @@ namespace BeWoPlanerMobil.Controllers
                         {
                             Model.SelectedValues.AddOrUpdate(parameterOid.Value, new SelectedValue(queryParameterType, selectedServiceCategory));
                         }
-                        break;
+                    break;
                     case QueryParameterType.SupportConcept:
                         var costBearer2SupportConceptRelListObj = Model.CostBearer2SupportConceptRelListObjects.FirstOrDefault(costBearer2SupportConceptRelListObject => costBearer2SupportConceptRelListObject.CostBearer2SupportConceptOid.Equals(objectOid.ToString()));
 
@@ -719,7 +719,7 @@ namespace BeWoPlanerMobil.Controllers
                         {
                             Model.SelectedValues.AddOrUpdate(parameterOid.Value, new SelectedValue(queryParameterType, costBearer2SupportConceptRelListObj));
                         }
-                        break;
+                    break;
                     case QueryParameterType.Team:
                         if(objectOid is null || objectOid.Value.Equals(0))
                         {
@@ -733,7 +733,7 @@ namespace BeWoPlanerMobil.Controllers
                         {
                             Model.SelectedValues.AddOrUpdate(parameterOid.Value, new SelectedValue(queryParameterType, selectedTeam));
                         }
-                        break;
+                    break;
                     case QueryParameterType.ValueListEntryType:
                         if(objectOid is null || objectOid.Value.Equals(0))
                         {
@@ -747,7 +747,7 @@ namespace BeWoPlanerMobil.Controllers
                         {
                             Model.SelectedValues.AddOrUpdate(parameterOid.Value, new SelectedValue(queryParameterType, selectedValueListEntry));
                         }
-                        break;
+                    break;
                     case QueryParameterType.Year:
                         break;
                 }
diff --git a/BeWoPlanerMobil/Views/DevExpressScheduler/SchedulerPagePartial.cshtml b/BeWoPlanerMobil/Views/DevExpressScheduler/SchedulerPagePartial.cshtml
index 7a34de776..c711e697e 100644
--- a/BeWoPlanerMobil/Views/DevExpressScheduler/SchedulerPagePartial.cshtml
+++ b/BeWoPlanerMobil/Views/DevExpressScheduler/SchedulerPagePartial.cshtml
@@ -1,4 +1,5 @@
 @using BeWoPlanerMobil.Views.DevExpressScheduler
+@using BS.Shared.DataContracts
 @using DevExpress.XtraScheduler
 @model BeWoPlanerMobil.Models.DevExpressSchedulerModel
 
@@ -50,8 +51,19 @@
             settings.Storage.Resources.Assign(SchedulerHelper.DefaultResourceStorage);
             settings.Storage.Appointments.Assign(SchedulerHelper.DefaultAppointmentStorage);
 
+            /*
+             *
+             */
+
             settings.Storage.Appointments.Assign(SchedulerHelper.DefaultAppointmentStorage);
             settings.Storage.Resources.Assign(SchedulerHelper.DefaultResourceStorage);
+            settings.Storage.Appointments.Mappings.Start = nameof(SchedulerAppointmentDC.StartDate);
+            settings.Storage.Appointments.Mappings.End = nameof(SchedulerAppointmentDC.EndDate);
+            settings.Storage.Appointments.Mappings.Subject = nameof(SchedulerAppointmentDC.Subject);
+            settings.Storage.Appointments.Mappings.AllDay = nameof(SchedulerAppointmentDC.AllDay);
+            settings.Storage.Appointments.Mappings.Description = nameof(SchedulerAppointmentDC.Description);
+            settings.Storage.Appointments.Mappings.Status = nameof(SchedulerAppointmentDC.Status);
+            settings.Storage.Appointments.Mappings.Label = nameof(SchedulerAppointmentDC.LabelKey);
 
             settings.Views.DayView.Styles.ScrollAreaHeight = new Unit(500);
             
diff --git a/BeWoPlanerMobil/Views/Main/SingleBookingPartial.cshtml b/BeWoPlanerMobil/Views/Main/SingleBookingPartial.cshtml
index 5be159062..bfefa2426 100644
--- a/BeWoPlanerMobil/Views/Main/SingleBookingPartial.cshtml
+++ b/BeWoPlanerMobil/Views/Main/SingleBookingPartial.cshtml
@@ -627,7 +627,7 @@
 				                            <span class="input-group-text rounded-0 border-left-0 border-right-0">
 					                            Bis
 				                            </span>
-				                            <input class="form-control" type="date" name="bis" onfocusout="loadServiceRecords()" value="@defaultEndDate"/>
+				                            <input class="form-control" type="date" name="bis" id="time-frame-end-date" onfocusout="loadServiceRecords()" value="@defaultEndDate"/>
 			                            </div>
 		                            </div>
 	                            </div>
diff --git a/BeWoPlanerMobil/Views/Shared/Error.cshtml b/BeWoPlanerMobil/Views/Shared/Error.cshtml
index 19d1517f8..034d282ad 100644
--- a/BeWoPlanerMobil/Views/Shared/Error.cshtml
+++ b/BeWoPlanerMobil/Views/Shared/Error.cshtml
@@ -1,19 +1,46 @@
-@{
-    Layout = null;
-}
-
-<!DOCTYPE html>
+<!DOCTYPE html>
 <html>
 <head>
     <meta name="viewport" content="width=device-width" />
     <title>Fehler</title>
+    <script type="text/javascript" src="@Scripts.Url("~/Scripts/jquery/jquery-3.7.1.min.js")"></script>
+    <script type="text/javascript" src="@Scripts.Url("~/Scripts/devexpress-dependencies/jquery/jquery.validate.min.js")"></script>
+    <script type="text/javascript" src="@Scripts.Url("~/Scripts/devexpress-dependencies/jquery/jquery.unobtrusive-ajax.min.js")"></script>
+    <script type="text/javascript" src="@Scripts.Url("~/Scripts/knockout-3.5.1.js")"></script>
+
+    <script type="text/javascript" src="@Scripts.Url("~/Scripts/bootstrap/bootstrap.bundle.min.js")"></script>
     <link rel="stylesheet" href="@Url.Content("~/Content/style.css")" />
+    
+    <script type="text/javascript">
+        function copyTextToClipboard() {
+            const element = document.querySelector("#error-textarea");
+	        element.select();
+	        element.setSelectionRange(0, 99999);
+
+	        document.execCommand("copy");
+        }
+    </script>
 </head>
 <body>
-<hgroup>
-    <h1>Fehler.</h1>
-    <h2>Es ist ein Fehler aufgetreten. Bitte wenden Sie sich an Ihren Administrator.</h2>
-    <h4>@ViewData["BeWoError"]</h4>
-</hgroup>
+<div class="navbar navbar-expand-lg sticky-top justify-content-end">
+	<div class="container-fluid">
+		<a href="#" class="navbar-brand m-0 p-0">
+			<img height="30px" src="@Url.Content("~/Content/images/bewoplaner_by_ownsoft_logo_mok.png")" alt="bewoplaner by ownSoft" />
+		</a>
+	</div>
+</div>
+    
+<div class="container lg-max-width mt-5">
+	<div class="card">
+        <div class="card-body">
+            <h1 class="card-title">Fehler</h1>
+            <p>Es ist ein Fehler aufgetreten. Bitte wenden Sie sich an Ihren Administrator.</p>
+
+            <button type="button" class="btn btn-primary" onclick="copyTextToClipboard()">Fehlerdetails Kopieren<span class="ml-3 fas fa-copy"></span></button>
+
+            <textarea id="error-textarea" class="form-control mt-2">@ViewBag.ErrorMessage</textarea>
+        </div>
+	</div>
+</div>
 </body>
 </html>
\ No newline at end of file
diff --git a/BeWoPlanerMobil/Web.Debug.config b/BeWoPlanerMobil/Web.Debug.config
index a83c1d4a0..bcf225805 100644
--- a/BeWoPlanerMobil/Web.Debug.config
+++ b/BeWoPlanerMobil/Web.Debug.config
@@ -21,10 +21,10 @@
       Note that because there is only one customErrors section under the 
       <system.web> node, there is no need to use the "xdt:Locator" attribute.
       
-      <customErrors defaultRedirect="GenericError.htm"
-        mode="RemoteOnly" xdt:Transform="Replace">
-        <error statusCode="500" redirect="InternalError.htm"/>
-      </customErrors>
+      
     -->
+    <customErrors defaultRedirect="Error" mode="On" xdt:Transform="Replace">
+	    <!--<error statusCode="500" redirect="InternalError.htm"/>-->
+    </customErrors>
   </system.web>
 </configuration>
\ No newline at end of file