Just figured out, that #SAPUI5 CDN does not support Evergreen Versions with #SAPBTP destinations. That is a problem, since outdated versions are removed from CDN. More infos and a #SAPAppRouter based solution can be found at btp.udina.de/service/exte... that even saves costs by bypassing the proxy.

A litlle bit later than last year, the #SAPAppRouter v19 supports nodejs 22 LTS. Now i can safely switch my local node env ;-)
btp.udina.de/tools/api-ex...