Hi Marc, yes, as you can see, you have 2 different versions of the library: f0f and FOF. FOF has to be removed.

Casing and use of 0 or O does not matter. It's the same library with different 'flavors'.

Hi Marc,

even if the libraries are not in the list of libraries in the console, some may still be on the server, so you have to look at the file structure of your server. Check under /libraries. Report any fof/fOF... directory you find and I will let you know which one(s) to delete.

Marc,

no, Akeeba was using those libraries before Joomla 4 and since these libraries have been outdated for quite some time, I doubt any extension is still using them since the libraries cannot function properly unless patched like we patched the one we included with J2Commerce 4.

We included this install 'stopper' in the latest versions of j2Commerce v4 to make sure sites do not carry obsolete libraries that users are not aware of.

'Dead' code can compromise your site, because it is not maintained and can be prone to breaches.