Schedule B line 7A

When Turbo Tax is checking for errors, I get a message that line 7A must be checked yes or no. I click on no. Run smart check again and it says line 7A must be blank. It won't allow me to continue because of this. When I check the "NO" block it errors out saying it must be blank. If I try to leave it blank, it says must be yes or no. What's going on? I need to check the no block, but it errors out with smart check.

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