I created a SVN repo on my university storage space, and attempted to check it out on my local machine, but kept receiving the following error:

Expected FS format '2'; found format '4'

I found many suggestions on the internet, however what ultimately worked for me was this

svnadmin create -pre-1.5-compatible repoName

You need to add the -pre-1.5-compatible flag to get it to work correctly. I am not sure what caused the issue, but I assume it was something relating to SVN being upgraded either on my local machine, or the university computers. Just thought I would post this here in case anyone else is having the same issues.