...and I didn't even minimize them on the test instance, so that people will feel their weight while the page load :D

I know it's kinda expected in these project... Let's say that if no one contributes it, I'll have to look up how to set it up, since I'm not really a web dev. But yeah it's gonna be there.

I'm self-hosting a minimal trello-like software I wrote https://github.com/michelematteini/tarallo... I'm using both on desktop and mobile.

That is the character set and collation that should be used, and your DB probably don't support it. You can try by leaving the default by removing "CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci" inside init_db.sql, anywhere you find it.

Edit: checking the readme some small changes would be required. Config.php should read in environment variables and the DB init SQL should be run automatically somehow.

I'll probably start with making these changes to make it compatible, thanks!