XS Admin Tool: Add allowed origin error: invalid Allow-From uri value

Hello,

I try to consume an XSOData-Service from another source. I followed this Post: CORS Issue while consuming Hana's OData

But when I try to add the server to allowed origins the error message "invalid Allow-From uri value" pops up.

In my JavaScript app the error message "o 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://xxx.yyy.zzz.com:8000' is therefore not allowed access" shows up when I try to load https://abcdefg.hana.ondemand.com/app/services/service.xsodata/$metadata