cterm plugin website only shows cursor.

1st Official Post

    Hi all,
    I have OMV running for a while without any problems but after the update from last week I cannot use the cterm plugin website anymore for any container or host.

    Now running on OMV 8.5.8-1 with Linux Kernel 7.1.8+deb13-amd64, Python 3.13.5 and cterm 8.0.2.


    On the cterm website I can see al my docker containers and my host session. After selecting one of the sessions I get the terminal page. The cursor blinks top left but does not respond to any keys.


    journalctl show my login

    Sep 13 19:56:57 nas python3[20273]: 2026-09-13 19:56:57,919 - __main__ - INFO - User admin-xxx logged in successfully


    and after the selecting the container/host session

    Sep 13 19:57:02 nas python3[20273]: message handler error

    Sep 13 19:57:02 nas python3[20273]: Traceback (most recent call last):

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/engineio/server.py", line 450, in run_handler

    Sep 13 19:57:02 nas python3[20273]: return self.handlers[event](*args)

    Sep 13 19:57:02 nas python3[20273]: ~~~~~~~~~~~~~~~~~~~~^^^^^^^

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/socketio/server.py", line 652, in _handle_eio_message

    Sep 13 19:57:02 nas python3[20273]: self._handle_connect(eio_sid, pkt.namespace, pkt.data)

    Sep 13 19:57:02 nas python3[20273]: ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/socketio/server.py", line 538, in _handle_connect

    Sep 13 19:57:02 nas python3[20273]: success = self._trigger_event(

    Sep 13 19:57:02 nas python3[20273]: 'connect', namespace, sid, self.environ[eio_sid])

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/socketio/server.py", line 617, in _trigger_event

    Sep 13 19:57:02 nas python3[20273]: return handler(*args)

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/flask_socketio/__init__.py", line 292, in _handler

    Sep 13 19:57:02 nas python3[20273]: return self._handle_event(handler, message, real_ns, sid,

    Sep 13 19:57:02 nas python3[20273]: ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    Sep 13 19:57:02 nas python3[20273]: *args)

    Sep 13 19:57:02 nas python3[20273]: ^^^^^^

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/flask_socketio/__init__.py", line 816, in _handle_event

    Sep 13 19:57:02 nas python3[20273]: ctx.session = session_obj

    Sep 13 19:57:02 nas python3[20273]: ^^^^^^^^^^^

    Sep 13 19:57:02 nas python3[20273]: AttributeError: property 'session' of 'RequestContext' object has no setter

    Sep 13 19:57:02 nas python3[20273]: 2026-09-13 19:57:02,871 - engineio.server - ERROR - message handler error

    Sep 13 19:57:02 nas python3[20273]: Traceback (most recent call last):

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/engineio/server.py", line 450, in run_handler

    Sep 13 19:57:02 nas python3[20273]: return self.handlers[event](*args)

    Sep 13 19:57:02 nas python3[20273]: ~~~~~~~~~~~~~~~~~~~~^^^^^^^

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/socketio/server.py", line 652, in _handle_eio_message

    Sep 13 19:57:02 nas python3[20273]: self._handle_connect(eio_sid, pkt.namespace, pkt.data)

    Sep 13 19:57:02 nas python3[20273]: ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/socketio/server.py", line 538, in _handle_connect

    Sep 13 19:57:02 nas python3[20273]: success = self._trigger_event(

    Sep 13 19:57:02 nas python3[20273]: 'connect', namespace, sid, self.environ[eio_sid])

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/socketio/server.py", line 617, in _trigger_event

    Sep 13 19:57:02 nas python3[20273]: return handler(*args)

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/flask_socketio/__init__.py", line 292, in _handler

    Sep 13 19:57:02 nas python3[20273]: return self._handle_event(handler, message, real_ns, sid,

    Sep 13 19:57:02 nas python3[20273]: ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    Sep 13 19:57:02 nas python3[20273]: *args)

    Sep 13 19:57:02 nas python3[20273]: ^^^^^^

    Sep 13 19:57:02 nas python3[20273]: File "/usr/lib/python3/dist-packages/flask_socketio/__init__.py", line 816, in _handle_event

    Sep 13 19:57:02 nas python3[20273]: ctx.session = session_obj

    Sep 13 19:57:02 nas python3[20273]: ^^^^^^^^^^^

    Sep 13 19:57:02 nas python3[20273]: AttributeError: property 'session' of 'RequestContext' object has no setter


    I have also updated my VMware Workstation with the latest updates and get the same results.

    I have disabled and reinstalled cterm, restarted the NAS, tried different browsers but without any good result.


    Does anyone have an idee what I am doing wrong / need to update ?

    Thank you.

  • votdev

    Approved the thread.
    • Official Post

    This was caused by a python3-flask update that came out yesterday. The cterm plugin has been updated and 8.0.3 is in the repo now.

    omv 8.5.11-1 synchrony | 7.0 proxmox kernel

    plugins:

    omvextrasorg 8.0.3 | kvm 8.3.4 | compose 8.2.2 | cterm 8.0.4 | borgbackup 8.2.1 | tempmon 8.0.5 |

    mergerfs 8.0.2 | scripts 8.0.6 | writecache 8.3.0 | backup 8.1 | kernel 8.1


    omv-extras.org plugins source code and issue tracker - github - changelogs


    Please try ctrl-shift-R and read this before posting a question.

    Please put your OMV system details in your signature.
    Please don't PM for support... Too many PMs!

    Thanks 2

    Hi ryecoaaron,


    Thank you for the quick response and the updated version. Now everything is working again.

    The OMV Plugins page was showing "openmediavault-cterm 8.0.3" installed. Even after page refresh.

    Still had to run apt upgrade.


    :) :) :) :) :) :) :) :) :)

    • Official Post
    Quote from Pourad Dunkos

    The OMV Plugins page was showing "openmediavault-cterm 8.0.3" installed. Even after page refresh.

    For updates like this where the plugin is already installed, you should only be looking at the Updates tab. Clicking Check and then install available updates would get you 8.0.3. The plugins tab is really just used for installing and determining whether the plugin is installed.

    omv 8.5.11-1 synchrony | 7.0 proxmox kernel

    plugins:

    omvextrasorg 8.0.3 | kvm 8.3.4 | compose 8.2.2 | cterm 8.0.4 | borgbackup 8.2.1 | tempmon 8.0.5 |

    mergerfs 8.0.2 | scripts 8.0.6 | writecache 8.3.0 | backup 8.1 | kernel 8.1


    omv-extras.org plugins source code and issue tracker - github - changelogs


    Please try ctrl-shift-R and read this before posting a question.

    Please put your OMV system details in your signature.
    Please don't PM for support... Too many PMs!

    Like 1

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