Frozen Facebook page

I have this problem on my MacAir only - Facebook on my iPad and iPhone work normally. I cannot get past the error page (see screen shot). I tried to report it to Facebook, but heard nothing back. Since it's only on the laptop, maybe it is more an Apple problem than Facebook? I don't recall what I was doing exactly when it froze up, but I may have been trying to manage a page in MetaBusiness.
Anyone have any ideas how to address this problem?

via Canadian Mac Forums at ehMac https://ift.tt/FdPGKfe