Trouble posting to Facebook

when I try to send to Facebook I always get an error message stating that it can’t post at this time. When I first signed up I declined FB because I didn’t want it to post automatically for me but I have gone into settings and clicking on the FB tab to allow. I still get the error code. I even uninstalled and reinstalled and that didn’t work either. What else can I do so I can post my Beautiful pictures to FB?