报错ValidationError: Progress Plugin Invalid Options

Background: I changed the name of the file and many configurations are gone. I can only start again and delete node_modules and package-lock.json. I also found many ways to repeatedly configure the two files. The fastest way is

npm i -D vue

After it was restored later, many problems appeared again. What has been bothering me is the content of the picture below 

Background: He reported an error when I ran npm run serve  

 I also tried many, many methods, delete node_modules, etc. I didn’t succeed, or you run the same error 

Until now I have found a way to solve the problem again  finally! finally! finally! solved

One more thing to add: pay attention to see whether your previous version is vue2 or vue3. If it is vue2, you can execute npm install -g yarn or npm i -D vue, it may automatically upgrade to vue3 for you, and in the comparison between vue3 and vue2 , the configuration of main.js is different  

The running prompt has a warning and reminds you to pay attention to the scaffolding and Vue version issues in main.js 

export 'default' (imported as 'Vue') was not found in 'vue'

The premise of encountering the above problem is that you have installed yarn and you only need to run yarn install to  succeed! ! !

Solution:

I am not very clear about what yarn is. For details, please refer to

Introduction to Yarn_cangchen@csdn's Blog-CSDN Blog_What is yarn

Install yarn first

npm install -g yarn

Re-execute

yarn install

I tried so many ways and it took me 2 hours to finally get it working on the second night. I'm really happy