Jetpack Publicize

That’s not a lot to go on.

I’d advise you check these pages first:

• https://jetpack.com/support/publicize/
• https://jetpack.com/support/publicize/troubleshooting-publicize/

Certainly, if you can’t get it working from those articles, I’d try disabling other plugins to see if there could be a conflict. Shouldn’t be a theme conflict, since you use Publicize from the WP Admin.

If you get stuck, there’s a contact us link on the above pages.

I hope that helps!