Enabling repository on Red Hat Satellite server logs message Failed at scanning for repository: undefined method `resolve_substitutions' for nil:NilClass

Solution Verified - Updated 2022-06-15T13:10:36+00:00 -

Issue

Enabling repository in Red Hat Satellite 6 logs following error message in /var/log/foreman/production.log though the repository is successfully enabled and no Satellite operations are impacted.
```
Failed at scanning for repository: undefined method `resolve_substitutions' for nil:NilClass
```

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