TypeError: this. getOptions is not a function

Use today webpack Packaging project , Installed less-loader Error after module , Here's the picture ：

  reason ： less-loader The installed version is too high
Solution ： 

Uninstall the current less-loader：

        perform ：npm uninstall less-loader
then , Download a lower version of less-loader Environmental Science ：

        perform ：npm install [email protected] --save

Be careful ！！！： After execution , Be sure to comment out the following code ,（ Step on the pit ）