Error when calling function module & (transaction &, program &)

What causes this issue?

When calling the function module &V1&, an error occurred within
transaction &V2& of program &V3&.

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?

To rectify the error, contact SAP.

Error message extract from SAP system. Copyright SAP SE.