Error: Failed to fetch

[ProTechEx]

When try open from the Browser, i get:
Error: Failed to fetch

root@raspberry:~/sucker# python3 srv/sucker.py
Bottle v0.12.23 server starting up (using GunicornServer())...
Listening on http://0.0.0.0:3000/
Hit Ctrl-C to quit.

[2022-09-16 11:22:44 +0300] [7069] [INFO] Starting gunicorn 20.1.0
[2022-09-16 11:22:44 +0300] [7069] [INFO] Listening at: http://0.0.0.0:3000 (7069)
[2022-09-16 11:22:44 +0300] [7069] [INFO] Using worker: sync
[2022-09-16 11:22:44 +0300] [7072] [INFO] Booting worker with pid: 7072
favicon requested
[2022-09-16 12:03:35 +0300] [7069] [CRITICAL] WORKER TIMEOUT (pid:7072)
[2022-09-16 12:03:35 +0300] [7072] [INFO] Worker exiting (pid: 7072)
sys:1: ResourceWarning: unclosed <socket.socket fd=5, family=AddressFamily.AF_INET, type=SocketKind.SOCK_STREAM, proto=0, laddr=('0.0.0.0', 3000)>
ResourceWarning: Enable tracemalloc to get the object allocation traceback
[2022-09-16 12:03:35 +0300] [7140] [INFO] Booting worker with pid: 7140
favicon requested