When clicking on the 'Free download' button on the model page the system redirects you to another page where you have to wait for 20 seconds for model files to be prepared for download. You can download the model files from the view that appears after 20 seconds.
If it still doesn't work, please try clearing cookies/cache of your browser and try again. Alternatively please try using a different browser.
Please note that there is a limit for free downloads. You can increase this limit by raising your reputation on our platform.