Paperspace instance failing to load lesson1.ipynb - Part 1 course

I just see that paperspace instance is failing to load the file lesson1.ipynb from part 1 course. I tried opening other files and it works perfectly fine. Tried from different systems/networks & same result for lesson1.ipynb

Error message (pop up):
“Error loading notebook”

Also seeing this on paperspace console:
[W 05:57:08.256 NotebookApp] 403 GET /api/contents/courses?type=directory&_=1527847024193 ( 0.89ms referer=None

Dont know why.

Nevermind, got it working after a restart and while accessed from a different PC.