One subsite has stopped functioning - all else are fine

Hi!

I have run into an odd little bug or issues that I can't explain. One of my subsites has all of a sudden stopped working - I just get the white screen of death when trying to view the front end and the admin area.

I just can't access it at all or some reason.

It shows in my list of sites and I can edit the details and settings from the network admin area but I can't actually access it using the it's subdirectory urls.

All my other sites seem to be running fine though.

Any thoughts of what I could be looking at or maybe a nudge in the right direction from any of you amazing WP experts?

Thanks for any help you can give me!