Hi @nuangel,
Thanks for reaching out!
Unfortunately, I wasn’t able to replicate this issue. On my test site, I had Uptown Style and Jetpack active, and I added the “Facebook Page Plugin” widget to the sidebar.
The widget was successfully resolving, as you can see here: https://prnt.sc/u71uba
This, most likely, means that another plugin is conflicting with Uptown Style and/or Jetpack.
Could you please check if all of your plugins, the Uptown Style theme, and WordPress are up to date?
Also, could you please try deactivating all other plugins instead of Jetpack, and see if you can replicate the issue? If the issue is gone, then try activating the plugins one by one to see which one is causing the issue.
Please let me know if any of these troubleshooting steps worked for you.