OSWeb - keypress not registering
I'm getting close to my wit's end with this, please help. My experiment runs fine in the main OpenSesame application, but when I run it in OSWeb it gets to the first introductory sketchpad item which ends "on keypress", and then just stalls out. Doesn't accept any input. I don't know what's happening. I tried changing it to mouseclick, which didn't work either. I tried changing it so it would time out after 5000 ms. That didn't work either. It just gets there and stops. This happened before with a feedback item too.
More suspiciously, I tried taking out the sketchpad item altogether and then it skipped the entire practice sequence. And then the main experiment loop started and it was registering keypresses correctly. I just don't really know what's happening.
I've tried reinstalling the latest version of OSWeb, btw.
I tried uploading the file here but I got a network error (too big??). Here are some screenshots instead.