Elements 18 and Share to Facebook

Forgive me if this has been asked before, I am new to PSE.  I have a new laptop, Dell XPS 15 and PSE 18 and when trying to share my photos to Facebook, the time taken to load one photo is painful, 2 to 4 mins.  I am unable to share more than one at a time.  And after being able to share a couple I keep getting this come up:

I am on wireless as the laptop is.  Any advice on both issues really would be appreciated.

Very many thanks

Elaine