Position cursor correctly

What causes this issue?

You have chosen a function that depends on the position of the cursor.
The function cannot be performed for the line or column on which the
cursor is currently positioned.

How to fix this error?

Position the cursor on a valid line or column (depending on function).

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

Error message extract from SAP system. Copyright SAP SE.