The actual problem is that utag.js uses a crappy minifier that injects syntax errors in it.
Which makes it impossible for `utag_data` in the `onclick` utag_data.page_name to evaluate.
For those trying to download the iso in a hurry, using chrome:
1) right-click on the manually download button of whichever ISO you want to download and you'll see something like:
You'll see something like above:
2. double-click on the onclick="if(utag_data.page_name)
3. use the arrow-keys to start editing
Note if you accidentally delete the tag, just reload the page and start again.
4. Change the utag_data.page_name in the parentheses to false and press enter. It should change to this:
5. WITHOUT RELOADING THE PAGE click the "Manually Download" button again and your download should start.