Thanks for replying, but your link doesn't match my issue.
I know the available PHP versions and know how to change them; no problem there.
OVH does offer PHP 8.5 on Mutu, but some extensions in its config are very old.
You can see their version, for example, on this phpinfo() of a page in PHP 8.5 with sqlite3 at 3.27.2, which dates back to 2019, while many applications require at least 3.40 (2022) and the latest is 3.53.
Only OVH can do an update :man_shrugging:
I hope someone from OVH will read this...
Hope keeps us alive :wink: