OK, so I called tech support this a.m. Got an agent after about 1 min on hold. I spoke with a very knowlegable and helpful agent named Valentina.
She guided me through some of the security and content settings on my browser, had me restart my computer, and shazam! I could do my booking. She said they are getting a lot of calls since the new website was launched.
She mentioned spaces between phone numbers, expired credit cards, etc which seem to be causing a lot of the problems. Not exactly sure what my problem was.

So I was able to make my Classic booking this a.m. without a glitch.

P.S. Still cant make seat selection on an award booking

I seem to recall that previously, the computer would just assign you a seat based on your profile preference-now it doesnt assign anything (at least the seat doesnt show up on the PNR that you can view on both AP & AC site)

Seem to recall Andrew Y saying this feature was coming soon?