upgrading styleguidist (node:55652) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'getCompilationHooks' of undefined

Any help with this issue much appreciated.

Current behaviour

As part of general package updates, upgrading styleguidist gives this error:

(node:55652) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'getCompilationHooks' of undefined
...node_modules/react-styleguidist/lib/scripts/utils/StyleguidistOptionsPlugin.js:30:37

Repo / Example of issue: https://github.com/comicrelief/component-library/tree/styleguidist_issue)