Hello @AllanH887 ,
I went into the account associated with this Community profile, and had no issues scheduling or unshceduling the drafted email. I'd recommend checking a few things on your Scheduling page if you're receiving that error, especially if this is in regards to an account not associated with your Comm profile that I can't check for you:
Select Edit for the physical address to make sure it's adequately formatted - no extraneous spaces before or after the zip code, state/province properly selected, etc.
Make sure a valid list is selected. If this is in regards to a trial account, make sure the list(s) you're selecting wouldn't put you over the 100 sendout limit.
Make sure the from and reply-to addresses for the email are still verified on the account.
Make sure there isn't a banner at the top of your screen, telling you to contact Review.
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