Thank you for your answer. But the fact is I need glasses !
I didn't see that, in the php.ini, there was a ";" before the "max_input_vars 1000" directive. So changing the value has no effect !
I remove the ";" and things are now ok.
But in the phpinfo page, I could see the line max_input_vars...
I am using an Oceandigital droplet with Openlitespeed / Wordpress (from the DO market place)
My changes in php.ini are ignored
According to phpinfo, I found the php.ini file here : /usr/local/lsws/lsphp83/etc/php/8.3/litespeed/php.ini
There is no virtualhost
I know I have to restart lsphp...