I have a problem with Joomla update that seems to come from route 66. I had not seen it as I had a problem with another extension.
I have de-activated the compatibility plugin. The site works well , as well on the admin side and the front side. BUT we get the update for the Fr language. And I cannot update without activating back the compatibility plugin. I have switched the debug to maximum and here is what I get
screenshot of error page
When I deactivate every part of the route 66 package, I can update with no error.
Thank you for your help