Cloudflare tunnel DNS not responding

Hello all, Been trying to figure this out on my own and been at it for around 5 hours this is the farthest i got and feel like im close just cannot finish it off. Just to take away as many variables as i can Cloudflare Tunnel is set up correctly with my DNS I am running the cloudflare tunnel on the same server as my application I am using the docker set-up to connect from outside my network. I am getting the error code DNS_PROBE_FINISHED_NXDOMAIN when trying to connect to my subdomain. any advise would be extremely helpful and thank you for your time, Luis