[Noob] Cant pass setup

[YttraZZ]

Hi everyone,

I recently had an issue i can get myself out.
I had a perfectly fine Traefik Manager install. Very useful and very well laid out.

My issue started due to a Traefik Plugin i try to get working for a long time. I got fed up of it showing in Traefik manager but being useless.
Error 1: I edited my dynamic conf file in Traefik to get rid of it. Edition was by deleting the lines instead of commenting.
Error 2: I also edited some http route for which the router was duplicated, just to tidy it up....

Upon logging back to Traefik Manager, it was havoc. Red banners everywhere, unable to load http routes. Meanwhile my traefik instance was fine.

Error 3: after 2hours of troubleshooting, i got fed up and nuked my docker container along with the local directories and tried to reinstall. I told myself that it was no biggy being docker.
I am unable to f**ùing reinstall it. I can deploy, i get the folders populated, i get the temp password, i roll the initial setup.
Upon the last page of the initial setup, as i press validate, i get an Error 500 Internal server error.
Same thing in the docker logs.

I do not understand what is wrong now as it is the same docker-compose file i have been using for 2 months now and the exact same traefik install that is working fine.

I can share whatever is needed, just ask.

I thank you in advance if some can help me. I really do like that app and i was starting to tune Traefik with it. I would rather keep going that way.

Edit1: i do not use docker volumes, only local directories.

Excerpt from Docker log :

[INFO] [traefik-manager] 10.0.10.81 → POST /setup
2026-10-05T06:57:17.176230459Z [traefik-manager] 2026-10-05 06:57:17,174 [ERROR] [app] Exception on /setup [POST]
2026-10-05T06:57:17.176252420Z [traefik-manager] Traceback (most recent call last):
2026-10-05T06:57:17.176254417Z [traefik-manager] File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 1511, in wsgi_app
2026-10-05T06:57:17.176255890Z [traefik-manager] response = self.full_dispatch_request()
2026-10-05T06:57:17.176257125Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T06:57:17.176258335Z [traefik-manager] File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 919, in full_dispatch_request
2026-10-05T06:57:17.176259596Z [traefik-manager] rv = self.handle_user_exception(e)
2026-10-05T06:57:17.176260701Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T06:57:17.176261880Z [traefik-manager] File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 917, in full_dispatch_request
2026-10-05T06:57:17.176263231Z [traefik-manager] rv = self.dispatch_request()
2026-10-05T06:57:17.176264374Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T06:57:17.176265508Z [traefik-manager] File "/usr/local/lib/python3.11/site-packages/flask/app.py", line 902, in dispatch_request
2026-10-05T06:57:17.176266709Z [traefik-manager] return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args) # type: ignore[no-any-return]
2026-10-05T06:57:17.176267913Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T06:57:17.176269100Z [traefik-manager] File "/usr/local/lib/python3.11/site-packages/flask_limiter/_limits.py", line 326, in __inner
2026-10-05T06:57:17.176270322Z [traefik-manager] return cast(R, flask.current_app.ensure_sync(obj)(*a, **k))
2026-10-05T06:57:17.176271459Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T06:57:17.176272594Z [traefik-manager] File "/usr/local/lib/python3.11/site-packages/flask_limiter/_limits.py", line 326, in __inner
2026-10-05T06:57:17.176273802Z [traefik-manager] return cast(R, flask.current_app.ensure_sync(obj)(*a, **k))
2026-10-05T06:57:17.176274975Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T06:57:17.176276084Z [traefik-manager] File "/app/app.py", line 1160, in setup
2026-10-05T06:57:17.176277398Z [traefik-manager] _write_self_route(self_route_domain, self_route_svc, resolver, entry_point=self_route_ep)
2026-10-05T06:57:17.176278611Z [traefik-manager] File "/app/core/self_route.py", line 18, in _write_self_route
2026-10-05T06:57:17.176279879Z [traefik-manager] _write_self_route_locked(domain, service_url, cert_resolver, router_name, entry_point)
2026-10-05T06:57:17.176290343Z [traefik-manager] File "/app/core/self_route.py", line 56, in _write_self_route_locked
2026-10-05T06:57:17.176291606Z [traefik-manager] cfg.setdefault('http', {}).setdefault('routers', {})[router_name] = router_entry
2026-10-05T06:57:17.176292737Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T06:57:17.176293865Z [traefik-manager] AttributeError: 'NoneType' object has no attribute 'setdefault'
2026-10-05T06:57:17.196740161Z [traefik-manager] 2026-10-05 06:57:17,196 [INFO] [traefik-manager] 10.0.10.81 → GET /favicon.ico
2026-10-05T07:00:16.451196419Z [traefik-manager] 2026-10-05 07:00:16,450 [ERROR] [traefik-manager] Route check could not list the host routes
2026-10-05T07:00:16.451218122Z [traefik-manager] Traceback (most recent call last):
2026-10-05T07:00:16.451219997Z [traefik-manager] File "/app/app.py", line 761, in _route_health_sources
2026-10-05T07:00:16.451221367Z [traefik-manager] apps, _mws = _build_all_apps(include_external=True, include_internal=True)
2026-10-05T07:00:16.451222628Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:00:16.451223785Z [traefik-manager] File "/app/core/routes_build.py", line 527, in _build_all_apps
2026-10-05T07:00:16.451225068Z [traefik-manager] all_middlewares.extend(_build_middlewares(config, cf))
2026-10-05T07:00:16.451226209Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:00:16.451227442Z [traefik-manager] File "/app/core/routes_build.py", line 388, in _build_middlewares
2026-10-05T07:00:16.451228640Z [traefik-manager] for mname, mdata in config.get('http', {}).get('middlewares', {}).items():
2026-10-05T07:00:16.451229882Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:00:16.451231038Z [traefik-manager] AttributeError: 'NoneType' object has no attribute 'get'
2026-10-05T07:05:16.587273657Z [traefik-manager] 2026-10-05 07:05:16,586 [ERROR] [traefik-manager] Route check could not list the host routes
2026-10-05T07:05:16.587295388Z [traefik-manager] Traceback (most recent call last):
2026-10-05T07:05:16.587297225Z [traefik-manager] File "/app/app.py", line 761, in _route_health_sources
2026-10-05T07:05:16.587298732Z [traefik-manager] apps, _mws = _build_all_apps(include_external=True, include_internal=True)
2026-10-05T07:05:16.587300029Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:05:16.587301378Z [traefik-manager] File "/app/core/routes_build.py", line 527, in _build_all_apps
2026-10-05T07:05:16.587302605Z [traefik-manager] all_middlewares.extend(_build_middlewares(config, cf))
2026-10-05T07:05:16.587303741Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:05:16.587304899Z [traefik-manager] File "/app/core/routes_build.py", line 388, in _build_middlewares
2026-10-05T07:05:16.587306099Z [traefik-manager] for mname, mdata in config.get('http', {}).get('middlewares', {}).items():
2026-10-05T07:05:16.587307264Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:05:16.587308431Z [traefik-manager] AttributeError: 'NoneType' object has no attribute 'get'
2026-10-05T07:10:16.722061328Z [traefik-manager] 2026-10-05 07:10:16,721 [ERROR] [traefik-manager] Route check could not list the host routes
2026-10-05T07:10:16.722092174Z [traefik-manager] Traceback (most recent call last):
2026-10-05T07:10:16.722095229Z [traefik-manager] File "/app/app.py", line 761, in _route_health_sources
2026-10-05T07:10:16.722096641Z [traefik-manager] apps, _mws = _build_all_apps(include_external=True, include_internal=True)
2026-10-05T07:10:16.722097821Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:10:16.722098958Z [traefik-manager] File "/app/core/routes_build.py", line 527, in _build_all_apps
2026-10-05T07:10:16.722100191Z [traefik-manager] all_middlewares.extend(_build_middlewares(config, cf))
2026-10-05T07:10:16.722101314Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:10:16.722102457Z [traefik-manager] File "/app/core/routes_build.py", line 388, in _build_middlewares
2026-10-05T07:10:16.722103622Z [traefik-manager] for mname, mdata in config.get('http', {}).get('middlewares', {}).items():
2026-10-05T07:10:16.722104802Z [traefik-manager] ^^^^^^^^^^^^^^^^^^^^^^^^^^
2026-10-05T07:10:16.722105935Z [traefik-manager] AttributeError: 'NoneType' object has no attribute 'get'

[xop01]

The stack trace points at Traefik dynamic config, not at Docker itself.

http is ending up as null (or missing inner keys) in a YAML file Traefik Manager reads. That happens easily if lines were deleted instead of commented and the file still parses but leaves http: empty/null. Then setup crashes on cfg.setdefault('http', {}).

What to try:

1. Find every dynamic YAML file Traefik Manager mounts (including anything you edited before the reinstall). Each needs a valid top-level http: block, at minimum empty maps, for example:

http:
  routers: {}
  middlewares: {}
  services: {}

2. Remove or fix broken files until http is never null.
3. Wipe the Traefik Manager data directory on the host (not just the container), redeploy, run setup again.

If it still 500s, paste the dynamic file Traefik Manager writes on the last setup step (redact domains/passwords).

@YttraZZ

[YttraZZ]

Ty for spending some time to check that.

I ended to the same conclusion, empirically as i am not yet able to read the logs !!
I commented any leftover in my traefik dynamic configuration file, restarted traefik manager .... and voila !!!

Yet now that you gave me the solution i can clearly see it in the log.... how stupid i am !!

Still impressed that it so breaking to Traefik Manager yet mundane for Traefik itself (seems anything irrelevant is discarded by Traefik).

Again, thank you very much for your time !!

[chr0nzz]

Glad you got it running again, and thanks for the detailed logs. You're right that this shouldn't have broken TM when Traefik was fine with it: an http: key with nothing under it is valid to Traefik but crashed TM. It's fixed in the next release (v1.15.1), so an empty section is now treated as empty instead of causing a 500.

[YttraZZ]

Cheers!! First time i contribute to a bug fix !!

And thanks again chr0nzz for the app. It's a gem to analyze and configure Traefik !!