this is a custom scheduler?
Debugging will only work with the full code and all customizations available.
What you can do:
Either use XDebug and go through the standard debugging procedure.
Or comment out all your code and only add one line of code which writes sth. into the log file. Then you gradually add your code from the commented out section to the section which get executed.
In both approaches, you’d simply check when an issue becomes apparent.
Then remove all your custom code first.
Make sure that everything is working properly in the standard setup (it usually is).
Then make small, incremental changes / add your code one by one and see when things break.
Your version is below 8.9 as it seems, which one is it?
You’re in Admin - Scheduler and then you’ve clicked on your job
“Inventory Expiry Reminder Every Minute”?
Or is this screenshot from somewhere else in the system?
If so, from where?
How did you create the job “Inventory Expiry Reminder Every Minute”?