Just made a quick test. It seems there is a problem preventing the JavaScript functions to run from the asset file.
However, if you run the same HTML from a URL it runs file.
I uploaded your file to a DTW folder
https://3ynihrnjb7v5zcebdgtvag-on.drv.tw/ThunkableTest/UserFiles/daniel_larry.html
And changed the URL of the Web Viewer to this URL and it worked OK.
Please check it this way and let me know.