It's working again, There were a lot of issues with "the internet" this past week. A decades old security certificate was forced to expire, breaking a lot of things, plus there was a massive outage for Facebook and many other connected companies, plus everything I touched electronically last week broke, and I did go on this forum, so...
But I did just click the link for the sequencer, and it opened right up, where it did not a few days ago.