+1
I am experiencing the same issue on Windows 10 machine (Edge, Chrome, FireFox)as of 9:50 CST. Also Chrome for Android and FireFox and Safari on iOS. Note: On Android the site briefly flashes the download confirmation screen (the one with the bold red font telling you what to do if the download doesn't begin in 5 seconds.)
GMing PFS on Thursday and Sunday, which will be hard if I can't download the scenarios ...