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The following error may occur when using Voyager's Management pages:

Solution

1. Stop Voyager
2. Go to the [Install Dir]\data\config directory
3. Make a copy of the security.dex file as a backup and save it in a different location
4. Delete the existing security.dex
5. Restart Voyager (this creates a new security.dex file)
6. Login using internal authentication (default should be set to admin/admin)
7. Re-register the AD groups 

Notes

• If you have not saved your list of AD groups, you can use a tool such as PsGetSid to recover null group names from SIDs in the backup copy of the security.dex file
• You may need to re-associate Saved Searches with Invalid Display Templates with valid Display Templates