Failed to run webpack: TypeError: webpack.LoaderOptionsPlugin is not a constructor

[akitengineer]

Following error is occurring when I am trying to run

node_modules/.bin/webpack

[JeffreyWay]

Can you do rm -rf node_modules && npm install && node_modules/.bin/webpack. Does it turn out differently?

[Bram-Zijp]

This and cleaning up my package.json solved the error running Laravel 5.3

[entozoon]

I keep ending up here debugging the same error but for a different reason - using yarn.
The problem being that the yarn.lock somehow ends up with broken packages and the solution, if it helps anyone, is simply to reset it all:

rm -rf node_modules
rm yarn.lock
yarn cache clean
yarn install
node_modules/.bin/webpack

[srikanthpullela]

Hi All,
I am getting the same issue while running the karma file.

"karma" : "2.0.0",
"karma-webpack": "^2.0.3",
"webpack": "^1.12.2"

Could you please let me know where I went wrong.