Error occurred when checking type $ group $.

What causes this issue?

Errors occurred when checking the routing.

How to fix this error?

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

If the check occurred online, display the checking log and remove the
causes for the errors.
If you saved the routing, call it up again and check it online. Display
the checking log and remove the causes for the errors.

Error message extract from SAP system. Copyright SAP SE.