The use of admin shares should not be utilized in creating a repository for AppAssue. These shares are meant for temporary usage within Windows to access a file or to copy data, not to have a sustained open/active/perpetual connection. Therefore once that session has an issue, or is closed, or otherwise terminated this can interfere with the core services and the compression/dedupe of the repository and/or ultimately lead to you not being able to mount it. The two options that can/should be used in creating a repo are:
Again the direct mount method where it is exposed as a local volume to the core is strongly recommended since the UNC path (CIFS) is not known to have favorable performance.