Bug - safe mode not working from collections tab

[bumbeishvili]

Safe mode is working without problems when I open notebook from notebooks tab

though it has problems when opened from collections tab

https://github.com/bumbeishvili/Assets/blob/master/Safe.gif?raw=true(image larger than 4 MB)

[bgchen]

Looks lilke /safe is being appended to the collection query parameter instead of the path.

[jashkenas]

This should now be fixed. Thanks for reporting!