Cannot connect to the server

[pippo73]

I'm trying to connect the ui to the server but I get an error
object ProgressEvent

and here the logs of the docker

root@esterno:/home/z-lmutt/simcu# docker logs headscale-ui -f
/docker-entrypoint.sh: /docker-entrypoint.d/ is not empty, will attempt to perform configuration
/docker-entrypoint.sh: Looking for shell scripts in /docker-entrypoint.d/
/docker-entrypoint.sh: Launching /docker-entrypoint.d/10-listen-on-ipv6-by-default.sh
10-listen-on-ipv6-by-default.sh: info: Getting the checksum of /etc/nginx/conf.d/default.conf
10-listen-on-ipv6-by-default.sh: info: Enabled listen on IPv6 in /etc/nginx/conf.d/default.conf
/docker-entrypoint.sh: Sourcing /docker-entrypoint.d/15-local-resolvers.envsh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/20-envsubst-on-templates.sh
/docker-entrypoint.sh: Launching /docker-entrypoint.d/30-tune-worker-processes.sh
/docker-entrypoint.sh: Configuration complete; ready for start up
2025/11/28 14:17:22 [notice] 1#1: using the "epoll" event method
2025/11/28 14:17:22 [notice] 1#1: nginx/1.25.3
2025/11/28 14:17:22 [notice] 1#1: built by gcc 12.2.1 20220924 (Alpine 12.2.1_git20220924-r10) 
2025/11/28 14:17:22 [notice] 1#1: OS: Linux 6.12.57+deb13-amd64
2025/11/28 14:17:22 [notice] 1#1: getrlimit(RLIMIT_NOFILE): 1024:524288
2025/11/28 14:17:22 [notice] 1#1: start worker processes
2025/11/28 14:17:22 [notice] 1#1: start worker process 30
88.209.90.216 - - [28/Nov/2025:14:17:54 +0000] "GET /manager/ HTTP/1.1" 200 1317 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0" "-"
88.209.90.216 - - [28/Nov/2025:14:17:54 +0000] "GET /manager/runtime.1590131aec10690a.js HTTP/1.1" 200 900 "http://x.x.x.x:8888/manager/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0" "-"
88.209.90.216 - - [28/Nov/2025:14:17:54 +0000] "GET /manager/polyfills.e5aa82bd34f7a03a.js HTTP/1.1" 200 33886 "http://x.x.x.x:8888/manager/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0" "-"
88.209.90.216 - - [28/Nov/2025:14:17:55 +0000] "GET /manager/styles.a259691665442625.css HTTP/1.1" 200 537356 "http://x.x.x.x:8888/manager/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0" "-"
88.209.90.216 - - [28/Nov/2025:14:17:55 +0000] "GET /manager/main.cb027095b4ffe6d2.js HTTP/1.1" 200 840601 "http://x.x.x.x:8888/manager/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0" "-"
88.209.90.216 - - [28/Nov/2025:14:17:55 +0000] "GET /manager/assets/simcu.png HTTP/1.1" 200 12405 "http://x.x.x.x:8888/manager/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0" "-"
88.209.90.216 - - [28/Nov/2025:14:17:56 +0000] "GET /manager/favicon.ico HTTP/1.1" 200 948 "http://x.x.x.x:8888/manager/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:145.0) Gecko/20100101 Firefox/145.0" "-"

Any idea how to connect to the HS server?