I'm trying to book award travel for ATL-SLC in August. I am consistently getting this message "We're sorry, there was a problem processing this search request. (Message 106)"

What does this mean? Is there a way to get around it?

I have not yet been able to link my Skymiles/Worldperks account (problem with the way my name is listed on each account), so I can't get the ticket on the Delta site.

Thank you,
Amanda