[Window] [Extension Host] [ExtensionServer] Failed to get Chrome DevTools MCP URL: Error: command 'antigravity.getChromeDevtoolsMcpUrl' not found

Google Antigravity
1

The terminal keeps throwing errors continuously, and after a while, the entire editor interface crashes :confused:

macOs 15.5
Antigravity Version: 1.16.5
VSCode OSS Version: 1.107.0
Commit: 1504c8cc4b34dbfbb4a97ebe954b3da2b5634516
Date: 2026-02-02T23:37:17.781Z
Electron: 39.2.3
Chromium: 142.0.7444.175
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Darwin arm64 24.5.0
Language Server CL: 864538994

CleanShot 2026-02-13 at 13.54.51@2x
CleanShot 2026-02-13 at 13.54.51@2x1920×1616 803 KB

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2

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image1194×259 21.2 KB

I had a similar problem, and I tried installing chrome-devtools-mcp directly in C:\Users\XXX\AppData\Local\Programs\Antigravity\resources\app\extensions. It fixed the recurring error, but when I opened Antigravity IDE for the first time, the error still appeared once or twice, then disappeared. Hopefully, Google will fix it soon.

3

Same here on macOS

Antigravity Version: 1.16.5
VSCode OSS Version: 1.107.0
Commit: 1504c8cc4b34dbfbb4a97ebe954b3da2b5634516
Date: 2026-02-02T23:37:17.781Z (1 wk ago)
Electron: 39.2.3
Chromium: 142.0.7444.175
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Darwin arm64 25.2.0
Language Server CL: 864538994

ERR \[Extension Host\] Failed to update user status Error: LanguageServerClient must be initialized first!
at R.getInstance (/Applications/Antigravity.app/Contents/Resources/app/extensions/antigravity/dist/extension.js:2:1119524)
at a.updateUserStatus (/Applications/Antigravity.app/Contents/Resources/app/extensions/antigravity/dist/extension.js:2:1208977)
at a.restartUpdateLoop (/Applications/Antigravity.app/Contents/Resources/app/extensions/antigravity/dist/extension.js:2:1209468)
at t.activate (/Applications/Antigravity.app/Contents/Resources/app/extensions/antigravity/dist/extension.js:2:729632)
at async KG.n (file:///Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:117:14166)
at async KG.m (file:///Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:117:14129)
at async KG.l (file:///Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:117:13585)
error @ workbench.desktop.main.js:2800
workbench.desktop.main.js:3624 \[Extension Host\] Failed to update user status Error: LanguageServerClient must be initialized first!
at R.getInstance (/Applications/Antigravity.app/Contents/Resources/app/extensions/antigravity/dist/extension.js:2:1119524)
at a.updateUserStatus (/Applications/Antigravity.app/Contents/Resources/app/extensions/antigravity/dist/extension.js:2:1208977)
at a.restartUpdateLoop (/Applications/Antigravity.app/Contents/Resources/app/extensions/antigravity/dist/extension.js:2:1209468)
at t.activate (/Applications/Antigravity.app/Contents/Resources/app/extensions/antigravity/dist/extension.js:2:729632)
at async KG.n (file:///Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:117:14166)
at async KG.m (file:///Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:117:14129)
at async KG.l (file:///Applications/Antigravity.app/Contents/Resources/app/out/vs/workbench/api/node/extensionHostProcess.js:117:13585)
4

I got the exact same error after upgrading MacOs and Xcode. The following steps has solved the issue:

  • Open Xcode and agree to the terms & conditions.
  • Reopen Antigravity app again.
5

Same issue on Windows.
Antigravity Version: 1.16.5
VSCode OSS Version: 1.107.0 (user setup)
Commit: 1504c8cc4b34dbfbb4a97ebe954b3da2b5634516
Date: 2026-02-02T23:37:17.781Z
Electron: 39.2.3
Chromium: 142.0.7444.175
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Windows_NT x64 10.0.26200
Language Server CL: 864538994

6

Same issue :smiling_face_with_tear:

Antigravity Version: 1.16.5
VSCode OSS Version: 1.107.0
Commit: 1504c8cc4b34dbfbb4a97ebe954b3da2b5634516
Date: 2026-02-02T23:37:17.781Z (2 wks ago)
Electron: 39.2.3
Chromium: 142.0.7444.175
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Darwin x64 24.6.0
Language Server CL: 864538994
7

I asked Antigravity about this. It wrote and installed an extension to silence the messages.

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