“Block-Based Widgets Editor” displays completely blank page on WordPress 5.8

@takna Im not seeing this in 5.8
Can you check the browser console to see what errors are there?

Hi @dcooney

Thank you for quick response.
The browser console error is below.

Uncaught TypeError: can't access property "PluginSidebar", wp.editPost is undefined
    <anonymous> https://domainname.com/wp/wp-content/plugins/instant-images/dist/js/instant-images-block.min.js?ver=4.4.0.2:55
    n https://domainname.com/wp/wp-content/plugins/instant-images/dist/js/instant-images-block.min.js?ver=4.4.0.2:1
    <anonymous> https://domainname.com/wp/wp-content/plugins/instant-images/dist/js/instant-images-block.min.js?ver=4.4.0.2:55
    n https://domainname.com/wp/wp-content/plugins/instant-images/dist/js/instant-images-block.min.js?ver=4.4.0.2:1
    <anonymous> https://domainname.com/wp/wp-content/plugins/instant-images/dist/js/instant-images-block.min.js?ver=4.4.0.2:1
    <anonymous> https://domainname.com/wp/wp-content/plugins/instant-images/dist/js/instant-images-block.min.js?ver=4.4.0.2:1`

I’ve uploaded the screenshot on
https://1drv.ms/u/s!AhjdnKX40LUzi0ZKhz5qrk5Zt2ER?e=7xtOZO

• This reply was modified 3 years, 8 months ago by takna.

@takna Hmm, this is strange I can’t reproduce on 5+ installs running 5.8.
I’ll try to test twenty-twenty this week.

No other users are reporting an issue so I’m thinking this may be something in your setup.

Hi,
I have the exact same issue : a blank widget admin page and the same error in the browser console log. I work with my own theme I developed. The theme never had any widget or sidebar so the widget page was not visible. A few hours ago I simply added a new sidebar with “register_sidebar” in my theme code, so the widget page was accessible in “Appearance > Widgets”, but when I click on it, it shows a blank page. The page displays correctly if I remove the widget block editor with remove_theme_support( ‘widgets-block-editor’ );

Also, if I disable the Instant Images plugin, I can see the widget page with the block editor without problems

@chemin9 @takna So I totally misread the initial thread and didn’t see the “Widgets” reference. Totally forgot WP 5.8 switched to blocks for widgets.

I see the issue and will get this fixed up this week.

thanks!

• This reply was modified 3 years, 8 months ago by Darren Cooney.

@dcooney
Thank you very much!

@takna @chemin9 Version 4.4.0.3 fixes this issue. Thanks again for reporting it.