I cannot login via Facebook due to this Facebook error: "For your account security, logging into Facebook from an embedded browser is disabled."

Account

How can I recover a lost account?

Account

I recently purchased lapis, but it has not been reflected in my account. What happened?

Billing

What does the "Unbind" button do in the Account Binding menu?

Google Login System

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I want to switch to the Google login option, how do I unbind my account linked to Facebook?

Google Login System