Can't log into the store

Hi, I'm unable to log into the store to claim Zemo or buy any of the offers on the site.
Whenever I do I get this message popping up.

The issue is only on my main account, as I was able to do it on my f2p account.
Whenever I do I get this message popping up.

The issue is only on my main account, as I was able to do it on my f2p account.
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