Event handlers not working, 404s for /nbextensions/ipyevents/extension.js

[snydej]

I've installed and reinstalled ipyevents many times as well as anything related and I can't get it to do anything. I've tried many of the examples from https://github.com/mwcraig/ipyevents/blob/main/docs/events.ipynb and I don't get any exceptions but none of the event handlers trigger like they should. I'm seeing 404 errors for a couple files, including /nbextensions/ipyevents/extension.js and I think this is related.

Here is the server output:

PS D:\> jupyter-notebook.exe
C:\Users\snydej\AppData\Local\Programs\Python\Python310\lib\site-packages\jupyter_events\schema.py:68: JupyterEventsVersionWarning: The `version` property of an event schema must be a string. It has been type coerced, but in a future version of this library, it will fail to validate. Please update schema: https://events.jupyter.org/jupyter_server/contents_service/v1
  validate_schema(_schema)
C:\Users\snydej\AppData\Local\Programs\Python\Python310\lib\site-packages\jupyter_events\schema.py:68: JupyterEventsVersionWarning: The `version` property of an event schema must be a string. It has been type coerced, but in a future version of this library, it will fail to validate. Please update schema: https://events.jupyter.org/jupyter_server/gateway_client/v1
  validate_schema(_schema)
C:\Users\snydej\AppData\Local\Programs\Python\Python310\lib\site-packages\jupyter_events\schema.py:68: JupyterEventsVersionWarning: The `version` property of an event schema must be a string. It has been type coerced, but in a future version of this library, it will fail to validate. Please update schema: https://events.jupyter.org/jupyter_server/kernel_actions/v1
  validate_schema(_schema)
[W 2024-12-20 01:50:46.711 ServerApp] A `_jupyter_server_extension_points` function was not found in nbclassic. Instead, a `_jupyter_server_extension_paths` function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
[I 2024-12-20 01:50:46.727 ServerApp] jupyter_lsp | extension was successfully linked.
[I 2024-12-20 01:50:46.727 ServerApp] jupyter_server_terminals | extension was successfully linked.
[I 2024-12-20 01:50:46.744 ServerApp] jupyterlab | extension was successfully linked.
[I 2024-12-20 01:50:46.749 ServerApp] nbclassic | extension was successfully linked.
[I 2024-12-20 01:50:46.749 ServerApp] notebook | extension was successfully linked.
[W 2024-12-20 01:50:47.053 ServerApp] A `_jupyter_server_extension_points` function was not found in jupyter_nbextensions_configurator. Instead, a `_jupyter_server_extension_paths` function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
[I 2024-12-20 01:50:47.053 ServerApp] jupyter_nbextensions_configurator | extension was found and enabled by notebook_shim. Consider moving the extension to Jupyter Server's extension paths.
[I 2024-12-20 01:50:47.063 ServerApp] jupyter_nbextensions_configurator | extension was successfully linked.
[I 2024-12-20 01:50:47.063 ServerApp] notebook_shim | extension was successfully linked.
[I 2024-12-20 01:50:47.094 ServerApp] notebook_shim | extension was successfully loaded.
[I 2024-12-20 01:50:47.094 ServerApp] jupyter_lsp | extension was successfully loaded.
[I 2024-12-20 01:50:47.094 ServerApp] [jupyter_nbextensions_configurator] enabled 0.6.4
[I 2024-12-20 01:50:47.104 ServerApp] jupyter_nbextensions_configurator | extension was successfully loaded.
[I 2024-12-20 01:50:47.104 ServerApp] jupyter_server_terminals | extension was successfully loaded.
[I 2024-12-20 01:50:47.104 LabApp] JupyterLab extension loaded from C:\Users\snydej\AppData\Local\Programs\Python\Python310\lib\site-packages\jupyterlab
[I 2024-12-20 01:50:47.104 LabApp] JupyterLab application directory is C:\Users\snydej\AppData\Local\Programs\Python\Python310\share\jupyter\lab
[I 2024-12-20 01:50:47.104 LabApp] Extension Manager is 'pypi'.
[I 2024-12-20 01:50:47.120 ServerApp] jupyterlab | extension was successfully loaded.
[I 2024-12-20 01:50:47.120 ServerApp] nbclassic | extension was successfully loaded.
[I 2024-12-20 01:50:47.135 ServerApp] notebook | extension was successfully loaded.
[I 2024-12-20 01:50:47.135 ServerApp] Serving notebooks from local directory: D:\
[I 2024-12-20 01:50:47.135 ServerApp] Jupyter Server 2.14.2 is running at:
[I 2024-12-20 01:50:47.135 ServerApp] http://localhost:8888/tree?token=b14bd75f3f3680d37330ee267b261720a7c76d3bc3a379d7
[I 2024-12-20 01:50:47.135 ServerApp]     http://127.0.0.1:8888/tree?token=b14bd75f3f3680d37330ee267b261720a7c76d3bc3a379d7
[I 2024-12-20 01:50:47.135 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 2024-12-20 01:50:47.200 ServerApp]

    To access the server, open this file in a browser:
        file:///C:/Users/snydej/AppData/Roaming/jupyter/runtime/jpserver-16992-open.html
    Or copy and paste one of these URLs:
        http://localhost:8888/tree?token=b14bd75f3f3680d37330ee267b261720a7c76d3bc3a379d7
        http://127.0.0.1:8888/tree?token=b14bd75f3f3680d37330ee267b261720a7c76d3bc3a379d7
[I 2024-12-20 01:50:47.617 ServerApp] Skipped non-installed server(s): bash-language-server, dockerfile-language-server-nodejs, javascript-typescript-langserver, jedi-language-server, julia-language-server, pyright, python-language-server, python-lsp-server, r-languageserver, sql-language-server, texlab, typescript-language-server, unified-language-server, vscode-css-languageserver-bin, vscode-html-languageserver-bin, vscode-json-languageserver-bin, yaml-language-server
[W 2024-12-20 01:50:57.891 ServerApp] 404 GET /nbextensions/ipyevents/extension.js?v=20241220095047 (7d0a00148ee646f387a118733cb7a3a8@127.0.0.1) 30.76ms referer=http://localhost:8888/notebooks/Documents/Math/Event%20test.ipynb
[W 2024-12-20 01:50:57.893 ServerApp] 404 GET /nbextensions/nbextensions_configurator/config_menu/main.js?v=20241220095047 (7d0a00148ee646f387a118733cb7a3a8@127.0.0.1) 33.67ms referer=http://localhost:8888/notebooks/Documents/Math/Event%20test.ipynb
[W 2024-12-20 01:50:57.961 ServerApp] 404 GET /nbextensions/widgets/notebook/js/extension.js?v=20241220095047 (7d0a00148ee646f387a118733cb7a3a8@127.0.0.1) 2.96ms referer=http://localhost:8888/notebooks/Documents/Math/Event%20test.ipynb
C:\Users\snydej\AppData\Local\Programs\Python\Python310\lib\site-packages\jupyter_events\schema.py:68: JupyterEventsVersionWarning: The `version` property of an event schema must be a string. It has been type coerced, but in a future version of this library, it will fail to validate. Please update schema: https://events.jupyter.org/jupyter_server/kernel_actions/v1
  validate_schema(_schema)
[I 2024-12-20 01:50:58.121 ServerApp] Kernel started: c10f7df4-f84c-4db0-a296-fe24e72f9fec
[I 2024-12-20 01:50:59.187 ServerApp] Connecting to kernel c10f7df4-f84c-4db0-a296-fe24e72f9fec.
[IPKernelApp] ERROR | No such comm target registered: jupyter.widget.control
[IPKernelApp] WARNING | No such comm: 43c44af8-6c8e-439b-a9f9-030fecc90f5f
[W 2024-12-20 01:51:01.992 ServerApp] 404 GET /static/nbclassic/ipyevents.js?v=20241220095047 (7d0a00148ee646f387a118733cb7a3a8@127.0.0.1) 2.07ms referer=http://localhost:8888/notebooks/Documents/Math/Event%20test.ipynb