t.isPlaceholder is not a function, Webpack Error

[vinayg-cp]

Bug Report

Describe the bug I am trying to add docz to an existing MERN project, which uses yarn workspaces. When I try to start the docz dev server I get the following error:

I will try updating the issue with a small repo if possible.

Environment

• docz version: [2.3.0 & 2.3.1] Tried both the versions
• OS: [Windows 10]
• Node/npm version: [Node v12.16.3/npm 6.4.1/yarn 1.22.4]

Additional context/Screenshots Add any other context about the problem here. If applicable, add screenshots to help explain.

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[bradbarrow]

I've just encountered this today adding docz to an existing project.

Identical trace to the above.

Ends with:

 ERROR #98123  WEBPACK

Generating SSR bundle failed

[BABEL] /Users/bradbarrow/src/shop/app/.docz/.cache/develop-static-entry.js: t.isPlaceholder is not a function

File: .cache/develop-static-entry.js

Environment

docz version: [2.3.1] OS: [Mac OSX 10.13.6] Node/npm version: [Node v12.18.3/yarn 1.22.4]