VSCode Extension: Unable to start the CircleCI Language Server

Since today I’m getting the “Unable to start the CircleCI Language Server” error message.

In the CircleCI logs output I can see:

Failed to start LSP server. Attempt 1: Error: Binary version mismatch: expected 0.8.2, got 0.8.2-pre.1

CircleCI extension version:


VSCode version:

Version: 1.84.2
Commit: 1a5daa3a0231a0fbba4f14db7ec463cf99d7768e
Date: 2023-11-09T10:50:47.800Z
Electron: 25.9.2
ElectronBuildId: 24603566
Chromium: 114.0.5735.289
Node.js: 18.15.0
OS: Linux x64 6.2.0-36-generic

Hi @rubensa , thanks for reporting this.
Could you try running the command CircleCI: Update Language Server please? We have just released a new version that should work as expected.
Screenshot 2023-11-21 at 10.18.36

Yes, that worked.

Updated to version 0.8.4.

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