This message is a flaw in the user interface. What happened is that you had an HSA and so in the HSA interview, you indicated that you had HDHP coverage. Since your spouse did not have an HSA, your spouse was never asked if he/she had HDHP coverage.
When at the end of the HSA interview, TurboTax asked what kind of HDHP coverage your spouse had on December 1, 2017, you probably answered "Family", because that was literally true. However, since your spouse did not indicate any coverage in 2018 (because he/she was never asked, not having an HSA), TurboTax incorrectly assumed that your spouse had coverage in 2017 but didn't in 2018 - hence, the "break".
In this case, when you see the question "What type of HDHP coverage did [your spouse] have on December 1, 2017?", answer "None". This is OK, because this question doesn't apply to your spouse anyway.
