FSE breaks admin when WooCommerce is active

[maddisondesigns]

Description

I wanted to try out the new Full Site Editing feature. After installing the TT1 Block theme as recommended by this post, I then clicked on the new Site Editor menu option, causing the Dashboard to break.

After checking my plugins, I noticed WooCommerce was activated. If I deactivate it, the Site Editor feature loads as expected, but as soon as I activate it again, it breaks.

Screen+Recording+2021-03-30+at+06.41.05+pm.mp4

Console Error message
TypeError: window.wpEditorL10n is undefined edit http://dev.wordpress-test.com/wp-content/plugins/gutenberg/build/block-library/index.js?ver=46baaa6f3f784fe4ecf746bbdb740050:68 Bh http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react-dom.min.de439aae.js:126 Dj http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react-dom.min.de439aae.js:162 unstable_runWithPriority http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react.min.e713ea3b.js:25 Da http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react-dom.min.de439aae.js:60 xb http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react-dom.min.de439aae.js:162 Bj http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react-dom.min.de439aae.js:162 U http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react.min.e713ea3b.js:16 onmessage http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react.min.e713ea3b.js:24 EventHandlerNonNull* http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react.min.e713ea3b.js:24 <anonymous> http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react.min.e713ea3b.js:9 <anonymous> http://dev.wordpress-test.com/wp-content/plugins/gutenberg/vendor/react.min.e713ea3b.js:9 react-dom.min.de439aae.js:125:24

Step-by-step reproduction instructions

1. Install TT1 Theme and activate
2. Activate WooCommerce
3. Click on Site Editor
4. See White Screen

Expected behaviour

The Dashboard shouldn't break

Actual behaviour

See above

Screenshots or screen recording (optional)

See above

WordPress information

• WordPress version: 5.7
• Gutenberg version: 10.2.1
• Are all plugins except Gutenberg deactivated? No. Gutenberg & WooCommerce only
• Are you using a default theme (e.g. Twenty Twenty-One)? TT1 Blocks

Device information

• Device: Mac Mini
• Operating system: macOS Big Sur 11.2.3
• Browser: Firefox 87.0

[aristath]

Closing as duplicate of #29132