ValidationError: Invalid options object. Less Loader has been initialized using an options object that does not match the API schema.

 - options has an unknown property 'modifyVars'. These properties are valid:

   object { lessOptions?, prependData?, appendData?, sourceMap?, implementation? }

npm  i less-loader@5.0.0

1 "less-loader": {

2             modifyVars: {

3                 'border-radius-base': '6px',

4                 'primary-color':'#009688',

5                 'link-color':'#009688'

6              }

7 }                

 1  "less-loader": {

 2           lessOptions:{

 3                 javascriptEnabled:true,

 4                 modifyVars: {

 5                     'border-radius-base': '6px',

 6                     'primary-color':'#009688',

 7                     'link-color':'#009688'

 8                 },

 9             }

10