webpack-cli problem

[SebCanet]

Hi,
testing this demo, I needed to upgrade many dependencies, so I updated ALL dependencies. But lanching it I have this error:

npm run start

> [email protected] start
> webpack-dev-server

[webpack-cli] Failed to load 'K:\lexical-variable-demo-main\webpack.config.js' config
[webpack-cli] Invalid options object. Copy Plugin has been initialized using an options object that does not match the API schema.
 - options[0] has an unknown property 'to'. These properties are valid:
   object { patterns, options? }

Thanks for helping.