I installed VisualSVN Server on my machine for source control and when I try to access it via the Repo Browser I get the error:
Unexpected HTTP Status 405 \
I think you are trying to access repo trough Tortoise using web browser URL.
This thing works fine in browser, but will return 405 in Tortoise:
https://path-to-svn-server/!/%23WEB/view/head/ProjectA
Try this as repo URL in Tortoise (assuming WEB is repo name, and ProjectA is subfolder):
https://path-to-svn-server/svn/WEB/ProjectA