How to connect MySQL?

I’m trying to connect mysql to my activepieces but it never works unfortunately.

It used to at a time but we have several issues.

At this stage :
Throwing errors is my issue
But I guess I need to whitelist ips as well as I’m seeing other topics.

What should be done ? I need a tuto please. Did anyone succefully managed it ?

Thanks.

What error does the connection menu show?