Cannot read properties of undefined (reading 'createWithContent')

[Oyyou]

Running this code

const html = "<p></p>";
const contentBlock = htmlToDraft(html);
const { contentBlocks, entityMap } = contentBlock;
const contentState = ContentState.createFromBlockArray(contentBlocks, entityMap);
const editorState = EditorState.createWithContent(contentState);

And getting this error:

Uncaught TypeError: Cannot read properties of undefined (reading 'createWithContent')
at TextBoxComponent.tsx:88:1
at commitHookEffectListMount (react-dom.development.js:23150:1)
at commitPassiveMountOnFiber (react-dom.development.js:24926:1)
at commitPassiveMountEffects_complete (react-dom.development.js:24891:1)
at commitPassiveMountEffects_begin (react-dom.development.js:24878:1)
at commitPassiveMountEffects (react-dom.development.js:24866:1)
at flushPassiveEffectsImpl (react-dom.development.js:27039:1)
at flushPassiveEffects (react-dom.development.js:26984:1)
at react-dom.development.js:26769:1
at workLoop (scheduler.development.js:266:1)

I've Googled it a bit, and came across a couple of times it was mentioned, but no concrete solution:
here
and here

Packages:

draft-js@0.11.7
react-draft-wysiwyg@1.15.0
html-to-draftjs@1.4.0

The code is as basic as it could be - so I'm not sure what the issue could be!