Hey I need help about the display - grid property of css

Question

I studied about it from a youtube . and tried to implement it but it does not shoe anything in this app . Does this property is not supported by sololearn. Because i pasted the code from youtube also but it does not work.So this property is not supported sololeran or by my device.
For reference take a look at this code :
https://code.sololearn.com/WlTZzXQ5ZMZM/?ref=app
https://code.sololearn.com/W59Q2xPsptmc/?ref=app

And for reference of grid property look this video:
https://youtu.be/JBupsN9Cmrs

Answer 1

its grid-template-areas with s

Answer 2

Taste But see the second code there it is written right but still not working

Answer 3

its working in my device

Answer 4

Taste tell me which device you use