If we see Approver list getting error while terminating the employee by using person Management?

Summary:

If we see Approver list getting error while terminating the employee by using person Management?Content (required):

Error :- 

The approval history can't be displayed because this task couldn't be assigned to any approver.

Details :-

Rleset didnt return any results. Reconfigure the conditions in the rule set TerminationsRuleSet for the task TerminationsApproval so that approvers are found. Model the ruleset so that it returns a list builder specification. 

Version (include the version you are using, if applicable):

21c

Code Snippet (add any code snippets that support your topic, if applicable):