This is a GitHub Pages repo hosting web demos of various tlaplus-community projects. You can visit it at https://tlaplus-community.github.io. Currently, it hosts web demos for the following projects:
If you try to run these demos locally by simply cloning the repo then opening one of the index.html
files in the browser, you will run afoul of this error (seen in your browser's developer console).
You can read the reasons for it, but the upshot is you have to set up a local http server.
This will likely be as simple as navigating to the repo directory and running python -m http.server
then navigating to http://localhost:8000
in your browser.