Sudenly i get this error:
I tried those solution and non of them works
Site Collection '500 INTERNAL SERVER ERROR' so i follrw the step here : enter link description here
clear the cache of sharepoint
in event viewer i got this error detail :
'contractType:Microsoft.IdentityModel.Protocols.WSTrust.WSTrustServiceContract;name:SecurityTokenService'
Update: here is the log files :