I can get only the initial entry screen, where some basic terms are stated and your two choices are to buttons labeled "Enter" or "Leave." When I hit Enter, nothing happens at all.

I am able to get in and log in using Firefox.

Update: I have two different "Chrome profiles" (I created one accidentally and never use it). But I tried the UMD on the profile I don't use, and doing that, I can at least get to a login screen for the UMD, but it then tells me my username/password combo is wrong. Meanwhile, that same username/password combo works fine to get me into the UMD on Firefox. I can even get onto the UMD via Chrome on my phone, using that same username/password combo. Meanwhile, on my main Chrome profile, i can't even get to the UMD login screen. Very strange!

Do you have any extensions active? Is your Chrome up to date? Are you getting any page cannot be displayed messages, or does it just not load? Are there any messages about encryption levels?

No "page cannot be displayed" messages, nothing about encryption levels. Just the super basic entry screen that a new visitor to the site would see, with a message about the site containing sexual content, and two big buttons that say "Enter" and "Leave." Nothing happens when I press the "Enter" button.

Chrome is up to date. I do have some extensions active, but nothing new, ones I've used for years without interference to getting in to the UMD.

I can't remember the exact cause of this but it's something to do with cookies and browser caching.