I had the same trouble as Kami some hours ago. (Forum - FAQ)
ONLINE SITE:
TREE - modern view: IMPOSSIBLE to add relatives!
I went round the problem: switched to classic view - it worked! Then switched back to modern view.
But I would not like to do this for ever.
I hope, this is a temporary failure.
TREE - modern view
- classic view - in either of them IMPOSSIBLE to change personal photo.
(the arrow is running and running around endlessly -- I tried in the labelling section - no result either)
Otherwise there has been some pleasant surprise among the latest improvements.
I am happy with your program as a whole - thank you!