Hi there,
Please can you share the URL to your experiment so that we can take a look? From your experiment page go > View code <> > settings (tab on left, cog image at bottom) > permissions > set to public > then share the URL of that page with us
In general, stuck on initializing means there is a JS syntax error somewhere and the usual approach we take to deal with this is.
- open developer tools as described in crib sheet.PsychoPy Python to Javascript crib sheet
- click the red error message that has the name of your file (with the .js extension).
- that will show you the line of code where you are having the error - go back to your BUILDER to fix it or share that error on the discourse page.
Becca