it seems that the viewer is continuously trying to reconnect despite the possible error occurring on your primary machine upon connection attempt.
Could you please check if the auto-reconnect is enabled on your iOS viewer app, then disable it and try again to connect. Then let us know if it gives any error code/info with connection time.
Then also check if there’s an error notification on your primary machine upon connection attempt.
For further analysis, could you also please run dxdiag.exe on your primary machine, click „Save All Information“, then attach the output file (dxdiag.txt) on your next reply.
By the way, please update to most recent spacedesk Driver v1.0.8 available on our website.