offer documents timed out and then invalid agreement id

Hi, just what the subject says. I was reading offer documents (hadn't signed anything yet) and had to leave unexpectedly for around an hour. When I returned there was a pop-up that said the documents require reload, and when I clicked that I was taken to a page saying 'invalid agreement id.'

That page has two links. the one for 'contact support' is a 404, which is hilarious.

Now, when I follow the original links from my new employer through the offer documents they are 'out for signature,' and when I click on the offer letter I always land on the invalid agreement ID page.

What should I do? I've tried a few different browsers.