User is getting error when trying to run the process that calls an approval process. 
There is  hierarchical relationship field in the user record and made the changes in approval process to let user choose the approver manually. These are the current settling:

While running the record the error is:

REQUIRED_FIELD_MISSING, missing required field: [nextApproverIds]: [nextApproverIds]

Hi All, I am having problem in resolving an error in the 'Customization Specialist superbadge' . The error message is 'The '# of Volunteers Still Needed' field on the 'Volunteer Shift' record is not working as expected'. I have tried all the options
i.e. IF( Desired_of_Volunteers__c - Shifts_Taken__c > 0, Desired_of_Volunteers__c - Shifts_Taken__c , 0) 

and Max(Desired_of_Volunteers__c - Shifts_Taken__c,0) also.
But no luck .So it's now no more fun!!  Kindly help me in solving this soon ...