Twitter embedded timeline isn't working


The Twitter Timeline Widgets that I’ve created in the past all asked me for “Domain” in addition to the link color, handle, etc… but I’m trying to create one for this new website and I’m not getting the option to create a domain name. I think that’s whats causing me to get the “tweets by @TBSBCo” link, instead of the timeline. Do you have any suggestions?

You can find my site here:

Thanks in advance!