Receiving a 500 Status Code when connecting Facebook

Hi! I’m receiving this error when I try to connect to Facebook:

`500 status code for “POST /sites/175377797/publicize-connections/new”‘

I’m not sure what it means. I’ve tried to do some googling and a lot of people say I need to do something with the xmlrpc.php file? When I go to that page (https://sendmethelink.org/xmlrpc.php) it seems to return what it should be returning, so I don’t know what the problem is.

Edit: A little more info, I’ve deactivated and reinstalled jetpack twice, I’ve disabled all other plugins and reinstalled jetpack, but still nothing.

Edit 2: Here’s the 500 code I can see in the Inspect Wizard: {"code":403,"headers":[{"name":"Content-Type","value":"application\/json"}],"body":{"error":"authorization_required","message":"An active access token must be used to access publicize connections."}}