5
I did not carry out the integrity check when I upgraded Xoops.
But I check it now, the only things missing were the "xoops_data", "xoops_lib" and "install" folder which are missing.
Some files are modified so it's shown as "content invalid" (e.g.
./class/xoopsform/tableform.php content invalid
./class/xoopsform/themeform.php content invalid
) but nothing is corrupted.
I don't know why it does not work anymore....