CmdletInvocationException: AuthorizationManager check failed

Hi
After upgrading to 2.8.3 from 2.5.3 anytime i click an element to run an onclick event i get the error CmdletInvocationException: AuthorizationManager check failed

debugging shows the following errors
[Error] DashboardHub Failed to execute action. AuthorizationManager check failed.
[Warn] DashboardHub Failed to execute endpoint. AuthorizationManager check failed.
[Error] Microsoft.AspNetCore.SignalR.Internal.DefaultHubDispatcher Failed to invoke hub method ‘clientEvent’.

any help much appreciated

unblocking the files in the website folder using command below resolved this thanks

dir -Path [directory path] -Recurse | Unblock-File