Upgrade broke administrative access - Bad Gateway on login

[psmode]

I have been running NGINX Proxy Manager since 2022 quite fine. I am using Rocky Linux 9.4 and this morning figured I should upgrade NPM with docker compose pull and docker compose up -d. This all seemed to work well and NPM is serving up connections. However, I cannot get into the admin interface on port 81. Any login returns BAD GATEWAY and leaves me on the login screen.

The fallback_error.log has entries from my login tries:

2024/05/21 13:15:41 [error] 188#188: *10 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.15.127, server: nginxproxymanager, request: "GET /api/ HTTP/1.1", upstream: "http://127.0.0.1:3000/", host: "nginx.lan.kitsnet.us:81", referrer: "http://nginx.lan.kitsnet.us:81/"
2024/05/21 13:15:45 [error] 188#188: *10 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.15.127, server: nginxproxymanager, request: "POST /api/tokens HTTP/1.1", upstream: "http://127.0.0.1:3000/tokens", host: "nginx.lan.kitsnet.us:81", referrer: "http://nginx.lan.kitsnet.us:81/login"
2024/05/21 13:15:50 [error] 188#188: *10 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.15.127, server: nginxproxymanager, request: "POST /api/tokens HTTP/1.1", upstream: "http://127.0.0.1:3000/tokens", host: "nginx.lan.kitsnet.us:81", referrer: "http://nginx.lan.kitsnet.us:81/login"

I have tried multiple clients and multiple browsers with the same result.

How do I regain control of this system?

[psmode]

I did some more testing with different version as specified in the docker-compose.yml file. Through trial and error I established that the last version to work was v2.9.22. Latest fails as does v2.10.4 and v2.10.0