Hi @ayomide_wilfred, welcome to the community. 
Thank you for pointing this out, since that console message is a warning and NOT an error it won’t break your React app, therefore you should be able to continue with the rest of the tutorial without any issues.
Just open the browser and visit localhost:3000 and you will be able to see all your components as expected.
However, if you want to resolve the issue stated in the warning, please follow the instructions mentioned in the following post:
If you have any doubts, please feel free to reach out to us.
Thanks and Regards.
Sourabh Bagrecha,
MongoDB