Regarding Microsoft spfx documentation

Hi there,

I try to create a spfx webpart by following Microsoft document "https://docs.microsoft.com/en-us/sharepoint/dev/spfx/web-parts/guidance/simplify-adding-web-parts-with-preconfigured-entries"

and a error message comes up. Is there anything missed?? or how should I check this error:

msft document:

my error: