npm run dev发生错误

[justicechuan]

Bug report（问题描述）

Failed to compile with 1 error

Steps to reproduce（问题复现步骤）

ERROR Failed to compile with 1 error 15:07:19

error in ./src/styles/element-variables.scss

Syntax Error: TypeError: Cannot read properties of undefined (reading 'indexOf')

@ ./src/styles/element-variables.scss 4:14-237 15:3-20:5 16:22-245
@ ./src/main.js
@ multi (webpack)-dev-server/client?http://192.168.0.111:9527&sockPath=/sockjs-node (webpack)/hot/dev-server.js ./src/main.js

Screenshot or Gif（截图或动态图）

Link to minimal reproduction（最小可在线还原demo）

Other relevant information（格外信息）

• Your OS:
• Node.js version:
• vue-element-admin version: