Extension madewithcardsio.adaptivecardsstudiobeta has provided an invalid tree item.

[Rowdy]

I get this error message when I open up the Adaptive Cards extension in VS Code :-(
Any ideas how to solve this issue?

I'm using version 1.2.1 of the Adaptive Card Studio

Version: 1.86.0 (user setup)
Commit: 05047486b6df5eb8d44b2ecd70ea3bdf775fd937
Date: 2024-01-31T10:28:19.990Z
Electron: 27.2.3
ElectronBuildId: 26495564
Chromium: 118.0.5993.159
Node.js: 18.17.1
V8: 11.8.172.18-electron.0
OS: Windows_NT x64 10.0.19044