Parallels Helm cannot reseller can no longer delete customer account

Suddenly one of my resellers stopped being able to delete a customer account and was getting the following error

Unable to perform the requested action as this Login has insufficient permissions

The rest of the resellers on the server however were able to delete accounts without problem. After several hours of searching and contacting parallels support the resolution was simple

The problem is insufficient account permissions for the reseller.

What I did was going to Home > Account Settings > Customer Account Roles, selecting the 'Reseller' role (the only available),

selecting 'Specify Permission' instead of 'Pre-defined Roles' in its configuration page and adding the 'Delete Account Profile' from 'Available Permissions' to 'Selected Permissions'.

Then I saved the changes I made and successfully deleted again...