Your key is not valid (code: 500)
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Hi,
I signed up for the 1-1000 plan and when I installed the activation key, I got the error “Your key is not valid. Error validating your MailPoet sending service key, please try again later (code: 500).”. I followed all the steps to activate the key, I deleted and reinstalled, it didn’t work.
Can you please help me?
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