So I attempted to use the Vanilla Launcher for Tenacity, however it said that I needed to verify my HWID (something along those lines). I knew that I'd done this already, but ran the Whitelister again anyways, but it just kicked me out saying I'd already went through the process.

I noted this "Add -noverify -XX:+DisableAttachMechanism -DintentApiKey=API_KEY to launch options if not using Intent Launcher."

However, I have no idea what "Launch Options" are. Is this just the JVM Arguments string?

    5 days later

    I know it happen to me to with all the client.
    Just use the intent launcher maybe you get minus performance bet is the only way to launch the client.