Error in the BAdI method

What causes this issue?

The BAdI method <ZK>GET_MULTIPLE_APPROVERS: Get Multiple Approvers</>
contains one of the following errors:
The parameter <ZK>EV_NO_IMPLEMENTATION_FLAG</> is set to False and the
parameter <ZK>EV_APPROVER_LEVEL</> is 0.
The parameter <ZK>EV_NO_IMPLEMENTATION_FLAG</> is set to False. The
parameter <ZK>EV_APPROVER_LEVEL</> is N (N <(><<)>> 0), and the number
of rows for the internal table <ZK>ET_APPROVERS</> is M (M <(><<)>> N; M
<(><<)>> 0).
The export parameter EV_APPROVER_LEVEL exceeds the maximum number of 10
approval steps: An error message is displayed on the user interface.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.