Regarding Microsoft spfx documentation

Frequent Contributor

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-wi..."

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

 

msft document:

Untitled.png

 

 

my error:

Untitled.png

Untitled.png

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