Acronis Cyber Protect, Acronis Cyber Backup: "Scheduler failed to run task with GUID 'X' because of error 2" errors in Windows Event Log

Symptoms

After agent update to Build 24600 or 24476, Acronis Scheduler randomly generates errors in Windows Event log:

Scheduler failed to run task with GUID '15C608E6-C6BD-4C21-B41C-E10368FDACD8' because of error 2 (Failed to find the file (folder) or the key (value) in the registry.)

GUID is different on each device.

Cause

Issue in the product. Obsolete service tasks are not deleted automatically during update.

Solution

Delete the traces of obsolete tasks manually: