Panel nil values updated Gmod servers

I need your help if possible because my server since the update to gmod tonight.
I have this error on the gamemode + assmod.

The error is : attempt to get length of field ‘Panels’ (a nil value)

How to fix it because I want to play with friends.
(If possible give me the line to add or change)
Good evening to you hoping for a response.

Go look in the niggles thread