VSCode button not showing up (GESIS Notebooks)

[404oops]

I have a repo which i forked from a school project, and wanted a vscode editor in my repo. No biggie, added the `conda install jupyter-vscode-proxy` into by postBuild file, and waited until it booted up. When it did, i was shocked when i found out that it doesn't work. I tried conda-forge, i tried pip, none of which worked