You were not covered by an ACA (ObamaCare) health insurance policy, if you received Form 1095-B, Health Coverage - IRS.gov. ObamaCare plans give you Form 1095-A, Health Insurance Marketplace Statement - IRS.gov.
You need to answer NO, on the Were you enrolled in any of these less common plans in 2016? screen.
Once you correct this, you should be able to E-file.
See the screenshot below.
