That looks like you have made a mistake when putting in your values...
Issues can be reported on the Steem slack channel, here is an article to tell you how. https://steemit.com/steemslack/@cryptogee/join-the-steemit-secret-club-get-some-slack
CG
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No, I intentionally pressed the button to see what is going to happen. Thanks.
OK, so it's not an error, it is just saying you haven't put in any values.
CG
User should never see "not a number" anywhere.