Hi Lynn,
Officially 11.2.12, 11.4 and 12.0 support S/4Hana versions. See the compatibility matrix here:
Winshuttle Function Module compatibility matrix If you can upgrade, try that first.
In 11.2.12, I have found a few areas of BP where scripts may not run well, i.e. you can record it but it doesn't run, which you seem to be experiencing. If that's the case, I suggest you open a Support ticket to see if we can get them working correctly.
Best Regards,
Sigrid
------------------------------
Sigrid Kok
PSE | Winshuttle North America
------------------------------