Last time this exact error happened to me (Aug 28, 2023):
Today I find I cannot login to the new advanced app. After entering my username, I get: **Couldn't load webpage** The webpage didn’t respond to the request in time. ※ IAMUSSauseast1_1693250006502_99999-2873216827.999
I gave up trying to get in after playing browser games on my end. And a week later it just started working again (Sep 6, 2023):
It’s for Samsung to fix something on their end - whatever it is they did that caused it in the first place. I gave up on this problem after I last tried to get it fixed a week ago. It wasn’t working on any of my computers. Just now I tried again… and now it is working. I’ve done nothing on my end since it wasn’t working. But now it is working.