The 1099-MISC/1099-K loop is a known bug in a recent update. The bug has been reported to TurboTax and they are working on it.
Here is a workaround that has worked for a number of other people. Give it a try. It should let you continue with the Schedule C interview.
https://ttlc.intuit.com/community/taxes/discussion/re-when-i-select-no-for-the-question-did-you-rece...
