Unable to Connect to MySQL database

This is so frustrating. I've spoken to PowerBI support and they couldn't help either. Main points:

Trying to connect to MySQL DB secured via SSL

This worked earlier in the year

Something changed (no idea what) and now I get an authenticartion error whenever I click login.

Things I've tried:

Reinstalling PowerBI

Installing versions 8.0.14, .15. 16 .17 and .18 of MySQL Connector

Using another computer

Adding certs to the computer cert store (Personal, Truster Root, Third party)

Removing everything and starting again

To prove it is something to do with the certs I've also asked the DB admin to remove them and this allowed me to connects immediately using username and password only

To prove the certs are okay I can connect to the DB from my maching using MySQL workbench. Interestingly you actully point to the cert pem files in the Workbench login screen. I also spoke to Tableau about this and their support were able to help me connect using the same certs with no issues.

Please, please, please can someone help.