Error client log shows "Trust evaluate failure: [leaf TemporalValidity]"
This error is related to the MacOS 'MRT' or Malware Removal Tool, and is not controlled by Magnus Box. The issue has been noted thus far only with externally-attached USB storage drives on 10.15.4 Catalina, but it may apply to other MacOS versions. The MRT removes or quarantines files arbitrarily, resulting in unexpected failures of Magnus Box and its processes.
We have no current solution for this issue, should you encounter it. The suggested solution is to use storage vaults located which are on the local network or cloud-based.