bind address already in use

hi all,

trying to do a reverse proxy on my ubuntu but i get this error


caddy reverse-proxy --from host.domain.com --to 127.0.0.1:8096
2026/08/14 20:13:15.658 WARN admin admin endpoint disabled
2026/08/14 20:13:15.658 INFO http.auto_https server is listening only on the HTTPS port but has no TLS connection policies; adding one to enable TLS {"server_name": "proxy", "https_port": 443}
2026/08/14 20:13:15.658 INFO http.auto_https enabling automatic HTTP->HTTPS redirects {"server_name": "proxy"}
2026/08/14 20:13:15.658 INFO tls.cache.maintenance started background certificate maintenance {"cache": "0xdc1a859f680"}
2026/08/14 20:13:15.658 INFO http enabling HTTP/3 listener {"addr": ":443"}
2026/08/14 20:13:15.658 INFO http.log server running {"name": "proxy", "protocols": ["h1", "h2", "h3"]}
2026/08/14 20:13:15.658 INFO tls.cache.maintenance stopped background certificate maintenance {"cache": "0xdc1a859f680"}
2026/08/14 20:13:15.658 INFO http servers shutting down with eternal grace period
Error: loading new config: http app module: start: listening on :80: listen tcp :80: bind: address already in use


thanks,
rob