SVN 403 on commit

Im currently using the ‘thunderbird’ machine and whenever I try and commit something to my svn repository (created via panel, not cli) I get:

PUT of ‘/canwww/!svn/wrk/1f481200-723e-0410-9197-a7d13bb329d3/svn-commit.tmp’: 403 Forbidden

I have other DH accounts that I have been able to commit to SVN successfully. I have tried deleting the repos and re-creating them. I have tried waiting a full day. Nothing works. Any ideas?