Hi Fabian,
I did that and then the error slightly changes to (note the node):
ERROR: Can't find target class ilobjcrtgui for node 2t:9z (ilrepositorygui).
So, apparently something happened.
Without having any knowledge about the 3rd option in the tools tab: does it help if I change the tree model?
The plug-in is a simple one: our customers can change the date format of the certificate dates to any locale they want. Just one property tab and some standard tabs from the example plugin :-).
Regards,
Rick
Update:
I switched on DEV_MODE and looked at the stack backtrace of the exception. I commented out the exception code in the method and logged in. No error, phew.
The plug-in existed on the repository and I clicked on it and Whoops showed me that there was an error handling the ref_id. So I removed the plug-in from the repository and uncommented the exception code. I could then log in without a problem. The plug-in is activated but has no ref_id whatsoever.
I will now try to add the plug-in back to the repository and observe what happens then.
Update 2:
No cigar, the same error occurs. The moment the plug-in has a ref_id the show is over.
Upadte 3:
To be 100% sure I installed the plug-in in a fresh 5.1.4 and it installed and worked without a problem.