Hi,
looked through you logs, and seems you got mismatch between stored logs files in SnapInfo and Snapshots available on Storage System, though your SnapInfo-Drive is tried to be reinitiated ([10:34:54.867] Warning: Invalid SnapInfo folder renamed to:).
I don´t think this is a connection / mapping issue, looks like SnapShots were delete via FilerView/Console and not through SMEXCH GUI.
If possible, try to delete all SnapShots on Filer + SnapInfo-Drive itself.
Then got through Setup-Wizard and define the new SnapInfo Drive, then by starting a new "clean" backup-cycle, things should work.
Hope this helps,
Marc