Lost access to the frontend

Suddenly I lost my access to lovelace. If I comment out the ssl part of the http integration I can access it locally but I lose the remote access through the duckdns. Any idea what I should do?

Few things could be wrong. Check ip_bans.yaml file in configuration folder if there is any IP address there listed. Of course if you have IP bans enabled.
Is your SSL certificate still available? That could be second problem.

In addition, do you have a static IP with your ISP?

If not sometimes mine will change and DuckDNS doesn’t cache it right away. Usually back up within10 min.

No, I don’t have static public IP address. But I use namecheap DNS servers, not DuckDNS.

Did you check the breaking proxy changes for 2021.7?

I’m running 2021.6.