Western Digital App Port Forwarding adress problem

i can’t change my Port Forwarding adress (pic) in the WD MyCloudEX2Ultra app.
So storj is offline.
What do I have to do?!

Here is some Additional Information from a former (german) thread we discussed:

This has been discussed as an issue with the Synology app as well. It seems there is a bug in this field that should be fixed in a later version.

A host address is not a host address and a port!!!