The repository is there, and it is signed. https://download.opensuse.org/repositories/Emulators:/Wine:/Debian/Debian_10/ The OBS did have some upgrades recently; maybe you were trying this while they were going on? Try adding it again. But why are you using the OBS instead of dl.winehq.org? Everyth...

OpenSuse repo for Debian seemes to be deleted/renamed: Access forbidden! You don't have permission to access the requested directory. There is either no index document or the directory is read-protected. If you think this is a server error, please contact the webmaster. Following the WineHQ way that...