Do you get "Wrong or expired code" repeatedly even after restarting the Browser with a new code? Then try these solutions:
* Check the Time on the device. Set it to update/sync via the Network/Internet
* Clear the Browser cache
Wrong or expired code for 2FA login
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I suggest that you try this first: https://poloniex.freshdesk.com/support/solutions/articles/1000227645-my-two-factor-codes-aren-t-working-incorrect-code-errors-
We noticed that Google's 2FA Authenticator can cause issues for some users, so we recommend to use Authy https://authy.com/ It also has features to backup your 2FA key's.
If the error persists please make a ticket with a request to reset the 2FA, or visit us on Discord https://discord.gg/Z6euxTE
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