After updating One Identity Manager to v10 LTS the issue occurs.
When attempting to open an ADS group or create a new one within Manager, the following error is created:
Document () could not be opened! Object reference not set to an instance of an object.
Collected the Trace logs only from Manager.log
ERROR (WinFormsExceptionHandler f6298e6f-f487-477f-957d-df20f7c5a1cd ) : Document (xxxxxxx) could not be opened! VI.Base.ViException: Document (xxxxxxx) could not be opened!
---> System.NullReferenceException: Object reference not set to an instance of an object.

The Error is also occurring in the Browser Manager application.

Using the default One Identity Manager "Schema Extension" tool, the affected table have changed. Prior to the update, no issues were present; however, after the update, the error is now being generated.
There is no issue when the table extension is performed while One Identity Manager is already on version 10 LTS.
The issue only occurs after an update.
This has been acknowledged as Product Defect #652585
If you encounter this problem, please contact our Support team and request for hotfix #652585
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