PMP service won't start - MySQL mysql.user has no `Event_priv` column at position 29

PMP service won't start - MySQL mysql.user has no `Event_priv` column at position 29

Hi there,

Our PMP installations tarted crashing on Friday.  These event log errors are showing:
mysql.user has no `Event_priv` column at position 29

We have changed the service to start as a privileged user to no avail.

I have attached the following logs from the  <PMP-Installation-Directory>/Logs folder  

Any assistance would be greatly appreciated.

Cheers,
Ken
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