This dependency was not found:import ‘element-plus/lib/theme-chalk/index.css‘；

出错的原因是包引入的时候路径发生了错误

把import 'element-plus/dist/index.css'
改为
import 'element-plus/lib/theme-chalk/index.css'

即可

This dependency was not found:import ‘element-plus/lib/theme-chalk/index.css‘；最先出现在Python成神之路。