Stuck on "Loading Discussions" in SPA

I have an Aurelia SPA configured to use pushstate.

I configured the embed:

I add the code:

sorry new users are limited to only one image!

The code loads up:

sorry new users are limited to only one image!

“Loading Discussions” forever

sorry new users are limited to only one image!

Constant refresh

sorry new users are limited to only one image!

No errors in the console. No messages in the log. It does work if I use topicId. What should I try next?