Cannot log into Fortnite: authentication error (injected dlls: auth)

[some9uy]

While trying to make a backend I was successful but when I tried hosting a match it via Reboot Launcher, when I pressed the Host button it gave me the error Cannot log into Fortnite: authentication error (injected dlls: auth). Could I get some help?

[Auties00]

This means that either your backend isn't working (switch to embedded) or that the HTTP redirect to bypass ssl pinning doesn't support the build you are using. If the latter is the case, you can try switching between cobalt, cranium and starfall to find one that works. If none work, you are out of luck: play another version