(zets says "on my phone's chrome browser", and the screenshot has phonelike elements...) I'm guessing Android, or at least I can test
my Android tablet. And... No problem here. Chrome and Firefox both uncomplaining, using https, no warnings/broken padlocks/anything else of note, on both
https://dwarffortresswiki.org/ and any sub-pages I click on from there (just to make sure).
I know I can go down from 4G to H+, H and even E at times (when off LAN), and it can disrupt downloads. Occasionally I get a page, but without (valid?) .CSS, and it gives a 'straight unformatted' page[1]. Sometimes I get a part page or the signal blips me into "No internet connection". (This isn't DF-Wiki, specifically, and I'm not sure it's happened for that. It's really more places that I'm far more frequently checking whilst out in the wilds/in the radio-shadow just down the road.) ...is it possible that you glitched the latest certificate update, and it hasn't then worked this out and corrected itself?
Also, perhaps you're
actually on a non-private connection... If it
were a Windows PC, I'd be looking for suspicious changes to the "hosts" file (".hosts" or similar would probably exist within your phone, too, but as likely to be protected from both your and malware access... not sure where I'd look for it, or the setting that gives the ability to reconfigure it 'wizardwise').
And that's cyrillic for Kb/s, yes? Perhaps your phone connection is being
officially 'Man-In-The-Middle'd by your service provider (your desktop connection is not, or it's being done 'better').
Plenty of options, and probably all of them utterly wrong. Force-reload the page? See if other https links give the same behaviour? Does it go wrong connected on your home wireless (that "x"ed signal bar, in that, or other connections that you might have) as well as when on mobile internet?
But if it's a site issue, I can't replicate[2], and there surely would be others mentioning this if it's been that kind of error "for a few weeks". Or whoever messed up the Trust Authority chain will know what they goofed, already. (It's happened before, I vaguely remember a 2007-8ish(? or 1997-8ish, even?) 'global mess-up' that hit a significant swathe of the internet. It needed, IIRC, a global updating via the messed up Certificate server/whatever, and took a couple of days and possibly relevent browser/internet settings being flushed, by impatient people, to hurry up the re-update. But before so much of a "https or nothing!" approach was widespread.)
So, you might need to do a bit of leg-work to try to give a bit more info (or find out it's definitely 'just' your issue), if my attempt to assist isn't
waaay off the mark. (I just tripped up over this thread, sorry for then jumping in.)
[1] Always fun. Some sites selectively hide input (like a Wiki (different wiki) that has its history contract certain details into a single line, but unCSSed gives them as 'a line per (new user created/whatever)', with timestamps on each rather than just the 'topmost'. And this is something I can do deliberately on desktop but I've never tried to invoke on the tablet, just work with it when it goes 'au naturel'.
[2] Maybe I've got far
too trusting a certificate hierarchy, somehow!