Use a computer or change your phone broswer to a computer version. It does not work on mobile version
Visit
https://imgur.comThat is true, and it is also possible to use imgur mobile app without needing to log in on the website and I find it more user friendly.
I do not think you need to log in to Imgur website to use their image hosting service. It works for guest accounts as well.
By the way, there is also imgbb.com as an alternative.