PsychoJS in local browser stuck at "initializing experiment"

For testing, I am running extremely simple code, with a text box that displays a single word. I cannot currently upload to pavlovia, server appears to be having issues.

When the browser opens, it just displays “initializing the experiment…”
Code runs fine in python.

If I fork working code from pavlovia, I encounter the same issue locally.
However, if I deploy the code, things work fine.

Any ideas?