Offer error on website

I have set up an offer and when I log in to the Tessa client as the TNEW user group I can sell a ticket after putting in the correct source code. However it is not working on the website. After putting in the source code, I can continue to the performance but get an error that tickets are no longer available online. I haven't ever had an issue like this where it can be sold in the client but not the website. Any thoughts?

Thanks,
Janna