This webpage can help you debug your Matrix LiveKit setup (also called "Element Call"). There are several moving parts to this setup, so it can be a bit difficult to debug sometimes.

The script on this page will follow the instructions from Continuwuity's documentation and tell you if anything goes wrong (and hopefully how to fix it).

The end result, if everything goes right, is a set of URL and JWT you can use on the official LiveKit connection tester

Feel free to have a look at the source code for this app.