You can resolve an ETH STARKKEY NOT MATCHED error using the following steps:

Note, these steps are for accounts that registered on after May 2021. if you first connected & used your address with prior to May 2021 then it is best to reach out to customer support so that the support team can check to make sure the following steps will still work for your account.

1) Clear your browser cache

2) Close your browser entirely (completely exit)

3) Re-open your browser

4) Navigate to and reconnect your Metamask, ensuring that you are connecting the correct address to

5) Follow the prompts that appear on the website to 'regenerate your trading key'
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