Hello,
after unninstall all product akeeba, and upgrade 3.10.2 to joomla 4.0.3 my website is ok
after install akeba admintools :
on my admin page message :
0 Class 'Joomla\Plugin\System\AdminTools\Extension\AdminTools' not found
message on my front end :
Sorry, there was a problem we could not recover from.
The server returned a "500 - Whoops, looks like something went wrong."
i restore my backup to get the website back functional while waiting for a solution.
thank you doc_denis