I have a problem with user_signature. The initial problem I mentioned here already:

https://www.odoo.com/es_ES/forum/help-1/question/typeerror-notify-got-an-unexpected-keyword-argument-user-signature-83499

But now I can not create more products, and I can not create more users. Always get the message: "TypeError: _notify() got an unexpected keyword argument 'user_signature'"

I had tried to delete the signature, they've re-created - but all without success. How can I solve this problem?

what struck me - if I want to change the signature, it takes about 5 attempts before the change is saved.