Block widget: unable to click Update, widget editor doesn't display widgets

[formosattic]

Quick summary

No response

Steps to reproduce

Unable to reproduce, only experienced on user's site (see details at 4830840-zd-woothemes ).

1. Open Customize > Widgets, widgets will show
2. Go to Appearance > Widgets, there's no widgets

I tested using the same theme (Scrawl), and copying over the user's block, but was still unable to reproduce the error.

What you expected to happen

Two things, from either Customize > Widgets or Appearance > Widgets:

• the widgets should show
• being able to edit and save'

What actually happened

Customize > Widgets works ok, can edit and save.

Appearance > Widgets, two issues:

• widgets are not showing
• cannot Update

Screen.Recording.2022-03-08.at.13.51.43.mov

Error from the console:

Context

4830840-zd-woothemes

There's a similar bug at #57339 but this site's widgets has no custom Visibility set.

Simple, Atomic or both?

Simple

Theme-specific issue?

Theme used is Scrawl, though I'm not sure it matters.

Browser, operating system and other notes

No response

Reproducibility

No response

Severity

No response

Available workarounds?

No response

Workaround details

Edit from Customize > Widgets.