[Gutenberg 13.3.0-rc.1] FSE: The Site Editor does not load

[rw-ye]

Quick summary

During our team testing, we found that the site editor does not load while using an FSE-compatible theme.

• Self-hosted sites are working normally.
• Non-a11n accounts are also impacted.

Error in Console

??-eJytVNGSmzAM/KEal…Pzt5fTL+tvH9w=:1028 Uncaught TypeError: (0 , c.dispatch)(...).setDefaultComplementaryArea is not a function
    at fo (??-eJytVNGSmzAM/KEal…TL+tvH9w=:1028:1510)
    at Module.Eo (??-eJytVNGSmzAM/KEal…TL+tvH9w=:1028:2321)
    at HTMLDocument.<anonymous> (VM1642 themes.php:16355:17)
fo	@	??-eJytVNGSmzAM/KEal…Pzt5fTL+tvH9w=:1028
Eo	@	??-eJytVNGSmzAM/KEal…Pzt5fTL+tvH9w=:1028
(anonymous)	@	VM1642 themes.php:16355

Steps to reproduce

1. Activate an FSE compatible theme: https://wordpress.com/themes/filter/full-site-editing
2. Open the site editor.
3. The site editor does not load.

What you expected to happen

The site editor to load.

What actually happened

The site editor did not load.

Context

During team testing of Gutenberg.

Simple, Atomic or both?

No response

Theme-specific issue?

No response

Browser, operating system and other notes

Chrome

Reproducibility

No response

Severity

No response

Available workarounds?

No response

Workaround details

No response

[sudeepbaral]

Site editor did not load for me as well. I tried in non-a8c account too and the issue persists. This happens across both simple and atomic sites. Error in Console:

Uncaught TypeError: (0 , c.dispatch)(...).setDefaultComplementaryArea is not a function

at fo (??-eJytVNGSmzAM/KEal…TL+tvH9w=:1028:1510)
at Module.Eo (??-eJytVNGSmzAM/KEal…TL+tvH9w=:1028:2321)
at HTMLDocument.<anonymous> (VM2997 themes.php:16371:17)
fo    @    ??-eJytVNGSmzAM/KEal…Pzt5fTL+tvH9w=:1028
Eo    @    ??-eJytVNGSmzAM/KEal…Pzt5fTL+tvH9w=:1028
(anonymous)    @    VM2997 themes.php:

[Addison-Stavlo]

suggested fix at #64093