Version Info

• node version: v14.15.0
• npm version: v6.14.8
• vue-cli version: v4.5.19
• vue version: v2.7.14
• typescript version: v4.9.4
• github url: https://github.com/djkloop/vue-cli4-vue-loader-error-npm-run-serve

Error Info Screenshot

Extra info

• According to the upgrade document of vue2.7 -> https://github.com/vuejs/vue/blob/main/CHANGELOG.md#upgrade-guide
• There is no configuration related to 2.7 and ts in it. I don’t know if there are related documents

Expected

normal operation