Journey "Build side-by-side extensions on SAP BTP": App works in BAS, but NOT when deployed to CF

[Jeff_G]

I followed all the steps in the journey.  All worked as expected until I deployed the app to CF.   Result in BAS:

However, when I build, deploy and try to test in CF, I get this error:  

• 502 Bad Gateway: Registered endpoint failed to handle the request

Does anyone know why this would happen?  

[Margit_Wagner]

Hi @Jeff_G
We have received your request and are in the process of evaluating the problem.
Please allow for a delay in our response.
Kind regards
Margit

[ssimsekler]

For people who reach here looking for an answer; check the comments section of the blog post here.