Cannot read properties of undefined (reading 'sendRequest')

[sanderDijkxhoorn]

Description

Ruby LSP Information

VS Code Version

1.131.0

Ruby LSP Extension Version

0.10.6

Ruby LSP Server Version

0.26.10

Ruby LSP Add-ons

• Ruby LSP Rails (0.4.8)
• RuboCop (1.88.2)

Ruby Version

3.4.10

Ruby Version Manager

mise

Installed Extensions

Click to expand

(I had to redact others, sorry)

• ruby-lsp (0.10.6)

Ruby LSP Settings

Click to expand

Workspace

{}

User

{
  "enabledFeatures": {
    "codeActions": true,
    "diagnostics": true,
    "documentHighlights": true,
    "documentLink": true,
    "documentSymbols": true,
    "foldingRanges": true,
    "formatting": true,
    "hover": true,
    "inlayHint": true,
    "onTypeFormatting": true,
    "selectionRanges": true,
    "semanticHighlighting": true,
    "completion": true,
    "codeLens": true,
    "definition": true,
    "workspaceSymbol": true,
    "signatureHelp": true,
    "typeHierarchy": true
  },
  "featuresConfiguration": {},
  "addonSettings": {},
  "rubyVersionManager": {
    "identifier": "auto"
  },
  "customRubyCommand": "",
  "formatter": "auto",
  "linters": null,
  "bundleGemfile": "",
  "testTimeout": 30,
  "pullDiagnosticsOn": "both",
  "useBundlerCompose": false,
  "bypassTypechecker": false,
  "rubyExecutablePath": "",
  "indexing": {},
  "erbSupport": true,
  "featureFlags": {},
  "sigOpacityLevel": "1"
}

Reproduction steps

1. Open VSCode Copilot Chat in agent mode in this example I was using my own Qwen3.6-35B-A3B-NVFP4 server (running with vLLM, which does support tool calling)
2. Run @ruby /design Any prompt
3. See unexpected behavior Error message

Cannot read properties of undefined (reading 'sendRequest')