Don’t worry about favicon, that’s completely unrelated (and meaningless, you see that on many websites).
Can you link the gitlab repository for your experiment? Go to “view code” and link that page, and make sure to go to settings -> general -> permissions on that page and set it to “public” so we can see it.
Generally speaking the way condition files work is very similar on Pavlovia and on your own computer, but there are a few things that can cause trouble, usually having to do with specific symbols like “$” or “#”, or using a condition file for a list (e.g., if you have positions in your condition file as [5,5] and refer to $position in the object. Here are a couple relevant threads: Cannot read property 'length' of undefined (importConditions)
Online experiment issue: TypeError message