[Vuejs]-In vue cli project i am facing this error i am already work on several vue projects

It seems your issue is related with path name.
Try to change folder name "vue project 2020" to "vue_project_2020".

The compiler can’t resolve filename or extensions correctly if folder name contains space.
And usually, it’s not good habit to include space and special characters in folder name.
In this case, you can use underbar "_"

Hope this helps you to understand

Update your node version. It worked for me.

On MacOs:

brew upgrade node