Hello @Gravity. Based on the links you're getting in your error messages it looks like you're using QIIME 2 2019.10. The QIIME 2 2019.10 version of the tutorial doesn't contain that command. If you look at the top left you'll find a drop down menu with the version in it.
Please select the version of QIIME 2 you're using from that menu and follow that version of the tutorial, or update QIIME 2.
Thank you.