RTK Rover connection request rejected due to a lack of Authorization header. According to NTRIP standard authorization header must present in rover request. Example of NTRIP client request:

GET /MountPointName HTTP/1.1
Host: mo.youcors.com
Ntrip-Version: Ntrip/2.0
User-Agent: RTKcommander/2.0
Authorization: Basic bnRyaXA6c2VjcmV0
Connection: close