Based on your question, I will presume you made the correct election to treat the LLC as a corporation and filed the necessary paperwork to elect to be an S Corporation for tax purposes.
If the above is correct, then no, the income reported on Sch K-1 from an S Corp is not subject to SE tax. What you need to do is to pay a salary from the S Corp to you, and in that salary, FICA taxes (SS and Medicare) are withheld from the paycheck and the corporation pays its share as well. There would also be withholding of Federal Income Taxes and State W/H if applicable.
For 2019, the S Corp should pay you a salary and Forms 941 should be filed timely. See the link below for information regarding employment taxes.
https://www.irs.gov/businesses/small-businesses-self-employed/employment-taxes
**Disclaimer: Effort has been made to offer correct information; but due to the discussion forum limitations, the poster disclaims any legal responsibility for the accuracy of the poster's response**