Oh, and one other thing, also check your day light savings time setting. If your currently under DST, and DST on your system is set to "off" this will also cause the authentication process to fail. My system defaults to DST on, and the region I live in does not use DST, as such everything was failing. SO to clarify, make sure your system time and date and time zone and DST settings are accurate for your current location. If they are not, correct and retry the 2fa addition to your PayPal account.
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