Uncaught (in promise) TypeError: this.layout is null

[ManPython]

Description

Check browser output part.

Reproduce

On tree:
/tree/test

Expected behavior

No any errors in console

Context

• Operating System and version: W11
• Browser and version: FF 121
• JupyterLab version:

jupyter --version
Selected Jupyter core packages...
IPython          : 8.20.0
ipykernel        : 6.28.0
ipywidgets       : 8.1.1
jupyter_client   : 8.6.0
jupyter_core     : 5.7.1
jupyter_server   : 2.12.4
jupyterlab       : 4.0.10
nbclient         : 0.9.0
nbconvert        : 7.14.1
nbformat         : 5.9.2
notebook         : 7.0.6
qtconsole        : 5.5.1
traitlets        : 5.14.1

Troubleshoot Output

Paste the output from running `jupyter troubleshoot` from the command line here.
You may want to sanitize the paths in the output.

Command Line Output

Paste the output from your command line running `jupyter lab` here, use `--debug` if possible.

Browser Output

```
ncaught (in promise) TypeError: this.layout is null
    _updateForDeferMode http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    _runOnIdleTime http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    _idleCallBack http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    requestIdleCallback handler*_scheduleCellRenderOnIdle http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    _insertCell http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    _onModelChanged http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    set model http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    ue http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    createNewWidget http://ManPythonJupyter.com/static/notebook/4234.bundle.js:1
    createNew http://ManPythonJupyter.com/static/notebook/9609.bundle.js:1
    createWidget http://ManPythonJupyter.com/static/notebook/4558.bundle.js:1
    _createOrOpenDocument http://ManPythonJupyter.com/static/notebook/4558.bundle.js:1
    open http://ManPythonJupyter.com/static/notebook/4558.bundle.js:1
    openOrReveal http://ManPythonJupyter.com/static/notebook/4558.bundle.js:1
    handleOpen http://ManPythonJupyter.com/static/notebook/9341.bundle.js:1
    evtDblClick http://ManPythonJupyter.com/static/notebook/9341.bundle.js:1
    handleEvent http://ManPythonJupyter.com/static/notebook/9341.bundle.js:1
    onAfterAttach http://ManPythonJupyter.com/static/notebook/9341.bundle.js:1
    processMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    _ http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    n http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    onAfterAttach http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processParentMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    notifyLayout http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    _ http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    n http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    onAfterAttach http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processParentMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    notifyLayout http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    _ http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    n http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    onAfterAttach http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processParentMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    notifyLayout http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    _ http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    n http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    onAfterAttach http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processParentMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    notifyLayout http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    _ http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    n http://ManPythonJupyter.com/static/notebook/7821.bundle.js:1
    onAfterAttach http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
    processParentMessage http://ManPythonJupyter.com/static/notebook/911.bundle.js:1
4234.bundle.js:1:68208
</pre>
</details>

[JasonWeill]

@ManPython Thanks for opening this issue! When do you see this error? Is it on initial load or when you try to do something? Does it cause any errors in the UI or does it only produce an error in the browser console?

[ManPython]

As wrote, the url: On tree: /tree/test - when created dir "test"