After entering credentials on the Enforce server Logon page an error is displayed "Error" "An unexpected error has occurred. Contact your system administrator if this problem persists.". However after pressing the "Go to Login page" the login is successfully completed and the Console loads.
DLP 16.0 MP1
This issue is caused by changes that were made to the logon page. It is only visual and only occurs when the Console is accessed by a link to https://Enforce.FQDN/ProtectManager/Logon specifically.
This is a known issue and is to be resolved in a future update. The current recommendation is to use the following URLs to access the Console:
The Console will automatically be redirected to the Logon page and the error will not be displayed after entering your credentials.
Any web browser bookmarks will have to be adjusted accordingly to reflect those URLs. Alternatively the same old URL can be used and the error can be ignored for the time being.