Came across this in a support request
The following errors were found :
- The SVN config directory does not exist.
- The SVN password file does not exist.
- The SVN access file does not exist.
The solution is before installing svnmanager run:
svnadmin create ~/repos
As the user you want to install it as.
Then rerun the installer. Make sure the repo path is /path/to/user/repos