I have been maintaining a WoW library for years but as of a day or two I am no longer able (or allowed) to commit.
Tortoise SVN 1.11 says "Access to '/wow/libtourist-3-0/!svn/me' forbidden"
I have no idea what could cause this. I am able to browse the repository and I am still assigned to the project as (the only) Maintainer. Unfortunately, the project owner has been unreachable for a very long time, so I can't ask him what's going on.
For the past two years, VCS clients were supposed to be using an API key instead of CurseForge credentials since CurseForge was switched over to using Twitch accounts and its own authentication system was decommissioned.
Early in April, every bit of the old authentication code was removed from the sites which brought to light the fact that in some cases the old credentials had been erroneously accepted. To fix this, go to the site your projects reside on and click your name on the top navigation bar. On the dropdown, select "My Account" and on the next page click into the My API Tokens tab. From there you'll be able to generate a new API token which you would use as the password in your VCS client.