Error after new installation of epicor 11.2.400.0

Hi All,
We have installed 11.2.400.0 version and using the database snapshot from 11.2.200.26 on a new server for testing and getting the below error:
The system doesnt start but if the customization are disabled it launches.
Can someone please help?
Thanks.

We need a lot more to go on.

What do you guys do with UD28? If it a login check that could be the issue.

Is this all users or one?