Image quotation from webpages

Hi,

i cant add image as reference, from website that i added in my references.
session ID: 43ecbf0f-0ad7-45b7-ae3d-51666219584a
Technical Information for the Citavi Team:
System.ArgumentNullException: Value cannot be null.
Parameter name: path2
at System.IO.Path.Combine(String path1, String path2)
at SwissAcademic.Citavi.Shell.Controls.Preview.PreviewControl.<CreateKnowledgeItemFromPdfSelectionAsync>d__64.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at SwissAcademic.ApplicationInsights.TelemetryClientBase.TrackException(SasExceptionTelemetry telemetry, ExceptionFlow flow, Boolean ignoreGlobalScope, String callerFilePath, String callerMemberName)
at SwissAcademic.ApplicationInsights.DesktopTelemetryClient.SwissAcademic.ApplicationInsights.ITelemetryClient.TrackException(Exception exception, SeverityLevel severityLevel, ExceptionFlow flow, ValueTuple`2 property1, ValueTuple`2 property2, ValueTuple`2 property3, String callerFilePath, String callerMemberName)
at SwissAcademic.ApplicationInsights.Telemetry.TrackException(Exception exception, SeverityLevel severityLevel, ExceptionFlow flow, ValueTuple`2 property1, ValueTuple`2 property2, ValueTuple`2 property3, String callerFilePath, String callerMemberName)
at SwissAcademic.Citavi.Shell.Controls.Preview.PreviewControl.<CreateKnowledgeItemFromPdfSelectionAsync>d__64.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
at System.Runtime.CompilerServices.TaskAwaiter.GetResult()
at SwissAcademic.Citavi.Shell.Controls.Preview.PreviewControl.<PerformCommand>d__155.MoveNext()