SQL Database Connector issue on the button "test the connection"

I’m trying to connect an external database on my app through the SQL Database Connector plugin, although, when I press the button “Test the connection” nothing happens. While I was trying to set the connection string, it was working normally, but now it just doesn’t work.
I have tried connecting my db on diferent apps, and on diferent accounts too. I really don’t know what’s going on. I would be really glad if someone could help me!!!

It would help if you pasted your sql plugin screen (blurring out your password and user name and server IP).

I already managed to solve it. It was just my password, it had characteres like @ and _
I changed my password and everything was solved!