What is the problem?
After sudo apt upgrade I cant connect to the webinterface of octoprint. SSH connection still works.
What did you already try to solve it?
ps -ef | grep -i octoprint | grep -i python: no output
sudo service octoprint restart: does nothing. Service doesnt start
I have had an error because of /etc/ld.so.preload there I commented out ������������������������������������������������������
Have you tried running in safe mode?
yes
Did running in safe mode solve the problem?
no
Systeminfo Bundle
You can download this in OctoPrint's System Information dialog... no bundle, no support, unless the reason you couldn't retrieve the bundle is your network issues
I am unable to create a systeminfo bundle because I cannot access the UI. From the command line when I try octoprint systeminfo . I get a command not found.
Additional information about your setup
Hardware you are trying to connect to, hardware you are trying to connect from, router, access point, used operating systems, ... as much data as possible
Raspberry Pi Zero 2WH, 32GB Sandisk Ultra, OctoPrint version : 1.11.5
OctoPi version : 1.1.0
~/.octoprint/logs/octoprint.log:
2026-01-15 05:16:13,786 - octoprint.startup - INFO - ******************************************************************************
2026-01-15 05:16:13,790 - octoprint.startup - INFO - Starting OctoPrint 1.11.5
2026-01-15 05:16:13,792 - octoprint.startup - INFO - Starting in SAFE MODE. Third party plugins will be disabled!
2026-01-15 05:16:13,792 - octoprint.startup - INFO - Reason for safe mode: setting in config.yaml
2026-01-15 05:16:13,793 - octoprint.startup - INFO - ******************************************************************************
2026-01-15 05:16:15,283 - octoprint.util.connectivity.connectivity_checker - INFO - Connectivity changed from offline to online
2026-01-15 05:16:15,299 - octoprint.util.connectivity.connectivity_checker - INFO - Connectivity state is currently: online
2026-01-15 05:16:15,299 - octoprint.util.connectivity.connectivity_checker - INFO - Connecting to 1.1.1.1:53 is working
2026-01-15 05:16:15,299 - octoprint.util.connectivity.connectivity_checker - INFO - Resolving octoprint.org is working
2026-01-15 05:16:15,820 - octoprint.startup - INFO - Blacklist processing done, adding 4 blacklisted plugin versions: roomtemp (any), GcodeEditor (>=0.1.1,<=0.2.8), gcodeleveling (>=0.1.0,<=0.1.1), PrintTimeGe>
2026-01-15 05:16:15,829 - octoprint.plugin.core - INFO - Loading plugins from /opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugins, /home/pi/.octoprint/plugins and installed plugin packages...
2026-01-15 05:16:17,851 - octoprint.plugin.core - ERROR - Error loading plugin softwareupdate
Traceback (most recent call last):
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 1339, in _import_plugin
module = _load_module(spec)
^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 74, in _load_module
spec.loader.exec_module(sys.modules[spec.name])
File "", line 940, in exec_module
File "", line 241, in _call_with_frames_removed
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugins/softwareupdate/init.py", line 25, in
from octoprint.server import BRANCH, NO_CONTENT, REVISION, VERSION
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/init.py", line 50, in
from octoprint.server import util
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/util/init.py", line 22, in
from . import flask, sockjs, tornado, watchdog # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: source code string cannot contain null bytes
2026-01-15 05:16:18,614 - octoprint.plugin.core - ERROR - Error loading plugin appkeys
Traceback (most recent call last):
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 1339, in _import_plugin
module = _load_module(spec)
^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 74, in _load_module
spec.loader.exec_module(sys.modules[spec.name])
File "", line 940, in exec_module
File "", line 241, in _call_with_frames_removed
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugins/appkeys/init.py", line 12, in
from octoprint.server import NO_CONTENT, current_user
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/init.py", line 50, in
from octoprint.server import util
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/util/init.py", line 22, in
from . import flask, sockjs, tornado, watchdog # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: source code string cannot contain null bytes
2026-01-15 05:16:18,728 - octoprint.plugin.core - ERROR - Error loading plugin gcodeviewer
Traceback (most recent call last):
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 1339, in _import_plugin
module = _load_module(spec)
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 74, in _load_module
spec.loader.exec_module(sys.modules[spec.name])
File "", line 940, in exec_module
File "", line 241, in _call_with_frames_removed
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugins/gcodeviewer/init.py", line 11, in
from octoprint.server.util.flask import no_firstrun_access
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/init.py", line 50, in
from octoprint.server import util
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/util/init.py", line 22, in
from . import flask, sockjs, tornado, watchdog # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: source code string cannot contain null bytes
2026-01-15 05:16:18,982 - octoprint.plugin.core - ERROR - Error loading plugin announcements
Traceback (most recent call last):
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 1339, in _import_plugin
module = _load_module(spec)
^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 74, in _load_module
spec.loader.exec_module(sys.modules[spec.name])
File "", line 940, in exec_module
File "", line 241, in _call_with_frames_removed
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugins/announcements/init.py", line 22, in
from octoprint.server.util.flask import (
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/init.py", line 50, in
from octoprint.server import util
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/util/init.py", line 22, in
from . import flask, sockjs, tornado, watchdog # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: source code string cannot contain null bytes
2026-01-15 05:16:19,207 - octoprint.plugin.core - ERROR - Error loading plugin backup
Traceback (most recent call last):
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 1339, in _import_plugin
module = _load_module(spec)
^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 74, in _load_module
spec.loader.exec_module(sys.modules[spec.name])
File "", line 940, in exec_module
File "", line 241, in _call_with_frames_removed
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugins/backup/init.py", line 8, in
from octoprint.server import NO_CONTENT
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/init.py", line 50, in
from octoprint.server import util
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/util/init.py", line 22, in
from . import flask, sockjs, tornado, watchdog # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: source code string cannot contain null bytes
2026-01-15 05:16:19,844 - octoprint.plugin.core - ERROR - Error loading plugin logging
Traceback (most recent call last):
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 1339, in _import_plugin
module = _load_module(spec)
^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 74, in _load_module
spec.loader.exec_module(sys.modules[spec.name])
File "", line 940, in exec_module
File "", line 241, in _call_with_frames_removed
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugins/logging/init.py", line 14, in
from octoprint.server import NO_CONTENT
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/init.py", line 50, in
from octoprint.server import util
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/util/init.py", line 22, in
from . import flask, sockjs, tornado, watchdog # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: source code string cannot contain null bytes
2026-01-15 05:16:20,131 - octoprint.plugin.core - ERROR - Error loading plugin pluginmanager
Traceback (most recent call last):
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 1339, in _import_plugin
module = _load_module(spec)
^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugin/core.py", line 74, in _load_module
spec.loader.exec_module(sys.modules[spec.name])
File "", line 940, in exec_module
File "", line 241, in _call_with_frames_removed
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/plugins/pluginmanager/init.py", line 28, in
from octoprint.server import safe_mode
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/init.py", line 50, in
from octoprint.server import util
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/util/init.py", line 22, in
from . import flask, sockjs, tornado, watchdog # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: source code string cannot contain null bytes
2026-01-15 05:16:20,660 - octoprint.plugin.core - INFO - Found 23 plugin(s) providing 16 mixin implementations, 28 hook handlers
2026-01-15 05:16:20,895 - octoprint.cli.server - ERROR - Uncaught exception
Traceback (most recent call last):
File "/opt/octopi/oprint/bin/octoprint", line 8, in
sys.exit(main())
^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/init.py", line 1030, in main
octo(args=args, prog_name="octoprint", auto_envvar_prefix="OCTOPRINT")
File "/opt/octopi/oprint/lib/python3.11/site-packages/click/core.py", line 1161, in call
return self.main(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/click/core.py", line 1082, in main
rv = self.invoke(ctx)
^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/click/core.py", line 1697, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/click/core.py", line 1697, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/click/core.py", line 1443, in invoke
return ctx.invoke(self.callback, **ctx.params)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/click/core.py", line 788, in invoke
return __callback(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/click/decorators.py", line 33, in new_func
return f(get_current_context(), *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/cli/server.py", line 326, in serve_command
run_server(
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/cli/server.py", line 149, in run_server
from octoprint.server import CannotStartServerException, Server
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/init.py", line 50, in
from octoprint.server import util
File "/opt/octopi/oprint/lib/python3.11/site-packages/octoprint/server/util/init.py", line 22, in
from . import flask, sockjs, tornado, watchdog # noqa: F401
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^