Gradebook is buffering and not allowing me to add assignements

[Helen000]

Hi, I've taken a screen shot. Gradebook in Schoology is not allowing me to add new assignments.  It just buffers from the moment I click add assignment and won't go any further.

[Helen000]

So, I've had a colleague with the same problem.  It seems to resolve itself if you log in via a browser where you haven't already got saved passwords or log in details.  I don't know why this is.  I logged in via Chrome both times, once with my current goggle account logged in - problems, the second time with a new window and an old account - no problems.  I'm not technically minded and have no idea why this is.