VM17:1 The "path" argument must be of type string. Received type undefined
TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received type undefined
at validateString (internal/validators.js:107:11)
at Object.join (path.js:1037:7)
at Object.checkThemeJSON (D:\software\IDE\微信web开发者工具\code\package.nw\js\common\compiler\json\theme.js:1:1292)(env: Windows,mp,1.03.2007151;lib: 2.8.3)
https://developers.weixin.qq.com/miniprogram/dev/devtools/nightly.html 已知问题，下载最新的 nightly 试试？