Error displaying widget: model not found

[ionox0]

Error displaying widget: model not found

[ionox0]

I see the following errors in the console:

index.es6.js:288 Plugin 'ipycanvas:plugin' failed to activate.
(anonymous) @ index.es6.js:288
index.es6.js:289 Error: No provider for: jupyter.extensions.jupyterWidgetRegistry.
    at e.resolveRequiredService (index.es6.js:201:35)
    at index.es6.js:156:70
    at Array.map (<anonymous>)
    at e.activatePlugin (index.es6.js:156:38)
    at index.es6.js:287:26
    at Array.map (<anonymous>)
    at e.start (index.es6.js:286:33)
    at G (index.out.js:625:7)
(anonymous) @ index.es6.js:289
272.d8d5a83bf0ac99d2aad5.js:1 Failed to fetch ipywidgets through the "jupyter.widget.control" comm channel, fallback to fetching individual model state. Reason: Control comm was closed too early
(anonymous) @ 272.d8d5a83bf0ac99d2aad5.js:1
523.45ece939ba0b134aa71f.js:1 Error: widget model not found
    at x.get_model (523.45ece939ba0b134aa71f.js:1:6292)
    at u.renderModel (523.45ece939ba0b134aa71f.js:1:972)
renderModel @ 523.45ece939ba0b134aa71f.js:1
272.d8d5a83bf0ac99d2aad5.js:1 Could not instantiate widget
(anonymous) @ 272.d8d5a83bf0ac99d2aad5.js:1
272.d8d5a83bf0ac99d2aad5.js:1 Error: Could not create a model.
    at 272.d8d5a83bf0ac99d2aad5.js:1:2205
    at async _handleCommOpen (523.45ece939ba0b134aa71f.js:1:2798)
    at async b._handleCommOpen (default.js:1094:102)
    at async b._handleMessage (default.js:1262:43)
(anonymous) @ 272.d8d5a83bf0ac99d2aad5.js:1
default.js:1101 Exception opening new comm
_handleCommOpen @ default.js:1101
2523.45ece939ba0b134aa71f.js:1 Uncaught (in promise) Error: Module ipycanvas, semver range ^0.13 is not registered as a widget module
    at x.loadClass (523.45ece939ba0b134aa71f.js:1:5727)
    at x.<anonymous> (272.d8d5a83bf0ac99d2aad5.js:1:9479)
    at 272.d8d5a83bf0ac99d2aad5.js:1:6081
    at Object.next (272.d8d5a83bf0ac99d2aad5.js:1:6186)
    at 272.d8d5a83bf0ac99d2aad5.js:1:5122
    at new Promise (<anonymous>)
    at D (272.d8d5a83bf0ac99d2aad5.js:1:4867)
    at e._make_model (272.d8d5a83bf0ac99d2aad5.js:1:9358)
    at x.<anonymous> (272.d8d5a83bf0ac99d2aad5.js:1:9212)
    at 272.d8d5a83bf0ac99d2aad5.js:1:6081
272.d8d5a83bf0ac99d2aad5.js:1 Could not instantiate widget
(anonymous) @ 272.d8d5a83bf0ac99d2aad5.js:1
272.d8d5a83bf0ac99d2aad5.js:1 Error: Could not create a model.
    at 272.d8d5a83bf0ac99d2aad5.js:1:2205
    at async _handleCommOpen (523.45ece939ba0b134aa71f.js:1:2798)
    at async b._handleCommOpen (default.js:1094:102)
    at async b._handleMessage (default.js:1262:43)
(anonymous) @ 272.d8d5a83bf0ac99d2aad5.js:1
default.js:1101 Exception opening new comm
_handleCommOpen @ default.js:1101
2523.45ece939ba0b134aa71f.js:1 Uncaught (in promise) Error: Module ipycanvas, semver range ^0.13 is not registered as a widget module
    at x.loadClass (523.45ece939ba0b134aa71f.js:1:5727)
    at x.<anonymous> (272.d8d5a83bf0ac99d2aad5.js:1:9479)
    at 272.d8d5a83bf0ac99d2aad5.js:1:6081
    at Object.next (272.d8d5a83bf0ac99d2aad5.js:1:6186)
    at 272.d8d5a83bf0ac99d2aad5.js:1:5122
    at new Promise (<anonymous>)
    at D (272.d8d5a83bf0ac99d2aad5.js:1:4867)
    at e._make_model (272.d8d5a83bf0ac99d2aad5.js:1:9358)
    at x.<anonymous> (272.d8d5a83bf0ac99d2aad5.js:1:9212)
    at 272.d8d5a83bf0ac99d2aad5.js:1:6081
523.45ece939ba0b134aa71f.js:1 Error: Module ipycanvas, semver range ^0.13 is not registered as a widget module
    at x.loadClass (523.45ece939ba0b134aa71f.js:1:5727)
    at x.<anonymous> (272.d8d5a83bf0ac99d2aad5.js:1:9479)
    at 272.d8d5a83bf0ac99d2aad5.js:1:6081
    at Object.next (272.d8d5a83bf0ac99d2aad5.js:1:6186)
    at 272.d8d5a83bf0ac99d2aad5.js:1:5122
    at new Promise (<anonymous>)
    at D (272.d8d5a83bf0ac99d2aad5.js:1:4867)
    at e._make_model (272.d8d5a83bf0ac99d2aad5.js:1:9358)
    at x.<anonymous> (272.d8d5a83bf0ac99d2aad5.js:1:9212)
    at 272.d8d5a83bf0ac99d2aad5.js:1:6081
renderModel @ 523.45ece939ba0b134aa71f.js:1