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Missing Parameter error

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When trying to login to my Firefox acct on my Android, it accepted my password, but when I paste the 2FA auth code from my Windows Authenticator app I get an error saying "Missing parameter: %(param)s"

How can I get into my account?

When trying to login to my Firefox acct on my Android, it accepted my password, but when I paste the 2FA auth code from my Windows Authenticator app I get an error saying "Missing parameter: %(param)s" How can I get into my account?
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