If i were to guess I'd say your using script blocker like no script which is stopping
the full captcha from displaying - i've had similar things on several different filehosts occur
verification required but no box to enter your answer into until you allow the site and the captcha part which can come under several names
- captcha
- recaptcha.net
- solve media
A right click on the page and allowing the names filefactory & captcha term (usually located under the websites name towards the top of the list)
or temporary allow all the page down the bottom,refresh the page should solve it.
Sometimes you will need to disable the script blocker before entering a filehost.
Several have captchas that even after allowing all the site will need to be re-allowed a 2nd time.
The original sign-up screen should look like this
