Silverstripe 4 does not allow MySQL connections over SSL. The feature was removed during the early betas for unknown reasons and has not yet been restored. An issue has been raised but remains unfixed ...
When you are using an existing or external MySQL database, it likely to have SSL required. Currently, this is not possible with the room-server etc. and results in [Nest] 300 - 06/20/2023, 1:17:50 PM ...