The error message is "An error has occurred"
When you try to login in BridgeIT with a user, you may get this error message as shown below;
This is a role or group privilege issue.
Solution / Workaround:
I resolve this by adding the following privilege to one of the user's role; "System - Non-Process Related Object - User Network Login" > READ Access only
I could be another type of role, but this is the one which worked in this case. Don't hesitate to share otherwise.