Use the diagnostic tool: Hubitat Diagnostic Tool | Hubitat Documentation
Click Download backups > download all your backups to your PC
Click Download latest version
Then Click Restore Previous Version
First you could try installing the current version
If that does not work, roll back to an older version, 2.3.6 if you have one. Then try updating again.
If none of that works, do a soft reset, then restore from your newest downloaded backup. (Restoring a backup does not change the firmware version, you can restore any backup to any firmware, does not need to match).
