Cannot link Instagram to Facebook?

This one is tricky.

I can log into Instagram using the Facebook log in option. I can open Facebook from Instagram.

I cannot share pics/vids/posts from Instagram to Facebook??

I tap on the “Connect to Facebook” button... it brings up a pop up with the option to connect. I tap “connect” and nothing.

I recently change my Facebook password and saw a video tutorial saying to delete Instagram as an app from Facebook, delete Instagram on my device, then reload it. Instagram is not an app on my Facebook. I have also deleted and reinstalled Instagram a few times now. I’ve logged in using Facebook and I am still in the same predicament.

Help!