I sent you an email with the info. Thanks.
Can you send me your URL (+create an admin account for me) so that I can see what's going on?
I don't know what is going on with my gallery. I am Piwigo running 2.2.4, I think. Every time I try to change my theme, check for upgrades, install an upgrade or do anything other than upload photos, I get a 404 error. I deactivated all the plugins and tried to auto upgrade. It did not work. What can I do? Thank you.