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Invalid Hex String:Null Error When Using Recovery Key

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Cloud Mobile
Cloud Mobile
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Hi, I'm trying to recover my FF account using the recovery key. I used Google Authenticator for 2FA, reset the phone, found out GA doesn't back 2FA accounts up remotely. That was a few years ago; I gave up and went back to Chrome. Trying again to regain access to my FF account now, if possible. I don't have the backup codes, but I do have the 32 character recovery code, but I'm getting this error (screenshot) trying to use it. I tried the key with spaces (8 4-character blocks) and without, got the error both times. What am I doing wrong here?

Hi, I'm trying to recover my FF account using the recovery key. I used Google Authenticator for 2FA, reset the phone, found out GA doesn't back 2FA accounts up remotely. That was a few years ago; I gave up and went back to Chrome. Trying again to regain access to my FF account now, if possible. I don't have the backup codes, but I do have the 32 character recovery code, but I'm getting this error (screenshot) trying to use it. I tried the key with spaces (8 4-character blocks) and without, got the error both times. What am I doing wrong here?
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Dropa
Dropa
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If your 2A fails and email reset code don't work that account is a lost account at this point. There's nothing forum users here can help to recover account or codes.

James
James
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https://support.mozilla.org/en-US/kb/reset-your-firefox-account-password-recovery-keys

Note if you reset password it will delete what you have synced.