Hello.
Well, that’s your issue… that’s one of the builds that have a bug where the rwdata partition gets full, causing all those issues you are having…
All known methods for recovering from that are located here → APIM Sync Settings Not Saving, VER_ERR08 Errors, Cannot Perform Master Reset or Upgrades/Updates (Solved) .
If none of those work, not even the legacy ones, sadly we do not have anything else to recommend at the moment.