cannot activate new theme plugin shopware 6

I am trying to create a new theme. When I try to activate the theme it is returning me following error:

 

Unable to compile the theme „Storefront“. Unable to load file „/app/vendor/shopware/platform/src/Storefront/Resources/app/storefr  
  ont/dist/js/vendor-node.js“. Did you forget to build the theme? Try running ./psh.phar storefront:build 

 

Does anyone faced this problem ?

 

 

Have you already found a way to fix this error?