Can't access home assistant from any device

As of today when I try and open the home assistant app on my phone i get NSURLErrorDomain - 1004, on my home computer not running HA, it just won’t connect. I have HA running on a NUC and using duckdns. It doesn’t matter if I’m connected to my home network or not. Please help, I don’t know how to fix it and as of right now I can’t use any automations in my home.

Try cleaning your app/browser cache.

Try connecting using a PC on your local network using the ip address, https://<ip_address>:8123 you will have to add a certificate exception.