Error HMS-0500-0500-0001-0007 after the update. Rolling back to the previous version.

For over a week, I ignored the software update notifications on my P1S. I kept pressing Cancel because I needed to finish the current order for DruкАрмія. I saw somewhere in the chats that the new version of the software blocks access to open-source slicers, etc. I was too lazy to figure it out.

Now, before launching a new batch into production - I updated the printer and received Error HMS-0500-0500-0001-0007 when trying to start printing.

Applications (Orca slicer, and even BambuLab (mobile application)) started showing MQTT Command Verification Failed.

Searching online showed that the easiest solution is to roll back to the previous version of the firmware. And fortunately, it's not that difficult to do.

Rolling back to the previous version turned out to be not difficult (I hope it stays that way in the future).Let's go to the menu:

Next - Firmware version:

Select - "I want to downgrade to a previous version":

Select the previous version of the firmware and press Install this version:

I chose the version "01.07...". Because the problem started on "01.08". The installation will take a couple of minutes.

After that, I restarted Orca Slicer and started printing as usual, everything is fine. But the update warning on the printer screen keeps appearing constantly again. But that's that. For now, the main thing is that the plastic is spinning, and the part is being printed.