In hosted-instance-log: "TypeError: Cannot read property 'path' of undefined" from vscode-builtin-json-language-feature

Describe the bug

stack error in hosted-instance-log when staring a workspace:

Extension-Host:Promise rejection not handled in one second: TypeError: Cannot read property 'path' of undefined , reason: TypeError: Cannot read property 'path' of undefined
Extension-Host:With stack trace: TypeError: Cannot read property 'path' of undefined
    at Object.a [as joinPath] (/default-theia-plugins/vscode-builtin-json-language-features/extension/client/dist/node/jsonClientMain.js:1:248754)
    at /default-theia-plugins/vscode-builtin-json-language-features/extension/client/dist/node/jsonClientMain.js:1:116514
    at Array.forEach (<anonymous>)
    at /default-theia-plugins/vscode-builtin-json-language-features/extension/client/dist/node/jsonClientMain.js:1:116371
    at Array.forEach (<anonymous>)
    at f (/default-theia-plugins/vscode-builtin-json-language-features/extension/client/dist/node/jsonClientMain.js:1:116229)
    at /default-theia-plugins/vscode-builtin-json-language-features/extension/client/dist/node/jsonClientMain.js:1:122454

Che version

• latest
• nightly
• other: please specify 7.28.0

Steps to reproduce

1. Start Camel K stack
2. look inside the hosted-instance-log output

Expected behavior

Runtime

• kubernetes (include output of kubectl version)
• Openshift (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Screenshots

Installation method

• chectl
  • provide a full command that was used to deploy Eclipse Che (including the output)
  • provide an output of chectl version command
• OperatorHub
• I don’t know

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• Dev Sandbox (workspaces.openshift.com)
• other: please specify

Eclipse Che Logs

Additional context

[tsmaeder]

I implemented the extensionURI stuff. However, when I open a package.json in the editor, I get an error message complaining it can’t load the schema from a uri like 'combinedschema://schemaservice/chepluginresource:/…`. It seems the json language service living at https://github.com/microsoft/vscode-json-languageservice gets its knickers in a twist on some non-standard URI’s, see for example https://github.com/microsoft/vscode/issues/115419. Note that the issue has been closed very recently, so this might be fixed in a new version of the plugin than what we have.

[apupier]

if you have no error in log, yes