webpack.validateSchema is not a function

Question

Webpack are throwing this error all of a sudden:

TypeError: webpack.validateSchema is not a function

Everything was working fine

Answer 1

it worked for me when i delete ^ and use the exact version.

From

"webpack": "2.1.0-beta.25",
"webpack-dev-middleware": "^1.6.1",
"webpack-dev-server": "^2.1.0-beta.9",
"webpack-md5-hash": "^0.0.5",
"webpack-merge": "^0.14.1"

to

"webpack": "2.1.0-beta.25",
"webpack-dev-middleware": "1.6.1",
"webpack-dev-server": "2.1.0-beta.9",
"webpack-md5-hash": "0.0.5",
"webpack-merge": "0.14.1"