(Archived) Can no longer share notebook with email address

[spu 4]

I was sharing a notebook with two individual and distinct email addresses. Both individuals were able to view and edit the notebook.

After a few days, one of the individuals could no longer see the shared notebook and their email address was "grayed" out.

I tried cancelling the permissions and then reinstating permissions to no avail.

I created a new notebook, moved the contents form the original notebook to it and again tried to set the permissions to the same two addresses.

I still could not give permissions to one of the email addresses. How do I correct this????

[Travis H 0]

I've got the same issue using a Mac. I am a premium user and my colleague is not. I am sharing another notebook with him and it works fine.