So I recently was attempting to setup traefik3 on my Linux machine, I used this tutorial to set it up. I have everything set up except when I attempt to access the dashboard on the web I keep getting a DNS_PROBE_FINISHED_NXDOMAIN error and then ERR_NAME_NOT_RESOLVED on my phone. I've ran nslookup and dig multiple times on the dashboard and it does resolve properly bringing back the IP address of the machine. I should also add that I did use Pi-Hole to setup the DNS records for it .
Well, if the domain is not correctly resolved, then it’s a network DNS issue, not a Traefik issue.
Most people with network DNS issues here are using Pi-Hole 
I guess some settings are wrong.