Interdisciplinary Program-- got off waitlist

I was offered admissions to some colleges within UT after i got off the waitlist. I want to do undergraduate school of studies but it keeps saying >> INVALID ACCEPT/DECLINE SOURCE VALUE. ENTER ? FOR HELP. << (XDEC).
What is wrong here?
I didn’t click any of the interdisciplinary programs b/c i don’t know what they entail and I really just want to get into Chemical Engineering. Was I supposed to? What happens if I do?

I’m getting the same error! Nice to see its not an isolated incident. And of course the Office of Admissions is closed right now.