download the package through cnpm I and start the project normally for the first time. An error will be reported if the correction is changed and the startup is changed.
indicates that the package is missing, as shown in the figure. I can understand the lack of error reports in the packages I need and quote, but I don"t think I can use them at all. Do not know the keyword search can not find related problems, ask the boss to provide the next keyword or trouble to explain simply, thank you very much!