This is an internal set of URLs that Subversion uses to manage commit transactions, etc. It looks like your server is no longer configured to host your repository at this URL.
You must verify that mod_dav_svn is still configured and configured. Can you get a clean check or perform any operation that negotiates with the server, for example. svn status -u ?
Alternatively, it could be a route filtering problem if your administrator tried to filter your access to specific paths in the repository. You will also always need access to the / svn / tree! Svn / tree and possibly also (thanks to an old error) to make an OPTIONS request to the root of the repository, / svn.
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