Graphical element not complete in loop. Operation not performed

What causes this issue?

You want to define a loop block. This is a rectangle where the size is
determined by the current cursor position and the element you choose as
the start of the loop block.
The rectangle contains part of a graphical element (e.g. radio button,
checkbox), but not the other part. For example, it may contain the
checkbox, but not its associated text.

System Response

Graphical elements must lie either completely within a loop block or
not at all.
The system cannot create the loop block and therefore does not execute
the operation.

How to fix this error?

Set the cursor, so that the system can create a loop block.

Error message extract from SAP system. Copyright SAP SE.