The error message "Extension activation failed" usually indicates that a Visual Studio Code (VS Code) extension didn't load properly. Here are some steps you can follow to troubleshoot and resolve the issue:
1. **Toggle Developer Tools**:
- Open VS Code.
- Press `Ctrl + Shift + I` (or `Cmd + Option + I` on macOS) to open the Developer Tools.
- Look for any error messages in the Console tab. This could give you clues as to why the