“Physical hosting updated” event is setup at Tools & Settings > Event Manager page. Whenever this event is executed it throws the following error:
ERR [panel] Cannot start event handler: Could not decode JSON, syntax error – malformed JSON
Version of Plesk is 18.0.36.
#PPPM-13048 "panel.log no longer contains the “Cannot start event handler: Could not decode JSON” errors if Plesk has added event handlers whose actions produce a long output to be trimmed."
- Plesk Obsidian 03 August 2021 (Linux)
If update is not possible for some reason you may try the following
This is a cosmetic error, it can be safely ignored.