SAP APF configuration modeler bug - cannot modify STEP - app is busy forever

[VictorHo]

Hello altogether,

I'm using SAP Fiori app "APF configuration modeler" to customize an QM Analytics app (Inspection Lot Detailed Analytics). But when I click on a "Step" to customize it, the app load forever. I checked the console log and got below error message:

Uncaught TypeError: Cannot read property 'includes' of undefined

Screenshot:

My current environment information:

SAPUI5-on-ABAP: 1.71.24 (built at 26.08.2020 08:33:00)
OpenUI5 Version: 1.71.21 (built at 24.08.2020 13:41:00)
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.36
App URL: https://*/sap/bc/ui2/flp#FioriApplication-editAPFConfigurationS4HANA&/app/15159889502561780808770101...

I'm looking for your advice on this topic.

Thank you!

[VictorHo · Accepted solution]

I've searched all the sources but no solution for this error. This issue happens on SAP S/4HANA 1919 (on-premise).

It's been fixed on S/4HANA version 2020. So i'd advise IT Admin to use version 2020 instead.