To resolve this issue, perform the following steps:
1. Repair mongo:
Stop the AppAssure Core service.
Delete the C:\program files\apprecovery\core\coreservice\mongo folder
Repair the Core install, reboot.
Once the folder has been deleted, the repair installation will re-create the Mongo folder as well as all files, dll's, and service.
Note: The Events tab may be empty after running this resolution. This is applicable to MongoDB related errors, missing/erroring AppAssure MongoDB service, as well as faulty events/reporting.
2. Repair .net
3. Restart the core service