Is it configured to point to a http or UNC repository?
It sounds like an authentication issue where the local admin doesn't have access to the network share whereas the domain admin would. Although the login credentials are normally provided by epo.
If its a UNC repo then the first step would be to double check the credentials, specifically the 'Download credentials (agent to repository):' creds.
Then check the credentials against the shared folder.
I aplogize for my delay in response..
It points to an HTTP repository.