Hi everyone,

Short history: I updated successfully to the last version of piwigo on a shared host. It does works fine as always did since some years. I don't really add much pics lately, just runs the site now and then just to keep the things under control (functionality, updates, etc).
Suddenly I face to an issue I never seen before: Fatal error: "Uncaught Error: Class 'mysqli' not found".
Well, the error message is longer and can be seen under neatpics.info

I have no clue how this situation occurred since the site worked fine long time after the latest update. No intervention was accomplish in between.

How could this be happened?

Help on this is greatly appreciated.