[Solved] Vue Start Project Error: ValidationError: webpack Dev Server Invalid Options

#Vue project development error
premise: during the development of Vue project, error: validationerror: webpack dev server invalid options appear when the project is started

problem analysis:
according to the problem description, the value of the “agent” object used to solve cross domain problems in the configuration file is empty

find webpack.config.JS or Vue.config.JS
then find devserver and comment out the proxy or fill in the complete configuration

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