Solved: GPT-4 not working after using a Custom GPT

So I tried using ‘Screenshot To Code’ custom gpt advertised on front page of custom GPT explore page. By try,I mean I uploaded a screenshot to see what it did.
It did nothing. It remained stuck on that page with the send button locked, and I ended up closing the tab after a while.

Then I tried to use my own built Custom GPT (which I’ve been using for a month or so), and now it has the same problem. As in I would write some prompt, hit enter and nothing happens (except the prompt bar clearing).

I then tried using base GPT-4, and it has the same issue, too.
GPT-3.5, however, is working as usual.
I’ve tried logging out and logging back in, and it doesn’t work.

Any ideas?
Thanks in advance.

Update: Fixed itself in about 30 minutes. I wonder if some kind of input stream got blocked and then reset on some constant interval.