Error 73 and “Exception in Hotend_fan”

[Lion]

I posted something similar in the ACE forum, but wasn’t sure it was relevant or not.
But you thought the same, so I will post it now.

Exception fan

My first run of the day keeps giving an !! Exception in fan message after printing the first layer. Any ideas on how to diagnose/resolve the issue? Using orca slicer with standard settings. Runs fine on subsequent runs. [PXL_20250114_110215011]