SVN : 500 internal server error on my repository access

Question

(OS is Ubuntu Server)

I create a new repository with SVN like that :

$ svnadmin create myrepo --pre-1.6-compatible

The first time, when

Answer 1

I suspect the repositories have the 'group'. Set it to the same as the group as the webserver:

sudo chown -R :www-data myrootrepositories