Please download the above RB Agent v1.18 and install it.
(Make sure no backups are running)
1. Stop agent (kill it if necessary)
2. Delete vss snaps
3. Uninstall the RB Agent
4. Delete the lsn.bin and scratchlsn.bin files, then delete snapshotDetails files from the Replibit folder.
5. Now install 1.18