[5.4.0] "A server error occurred" when adding entry link

[mmikkel]

Description

Since updating to CKEditor 5.4.0, whenever an entry is selected in the link modal an "A server error occurred" error toast appears.

Curiously, there doesn't seem to be an actual server error logged, but the devtools console lists this error message:

ckeditor5-craftcms.js:1365 Uncaught (in promise) TypeError: Cannot read properties of null (reading 'siteDropdownView')
    at ckeditor5-craftcms.js:1365:61

This only happens on single site install; unable to reproduce on a multisite.

Steps to reproduce

1. Have a single-site Craft install
2. Create an "Entry" link in a CKEditor field and select an entry in it

Additional info

• Craft version: 5.9.18
• PHP version:
• Database driver & version:
• Plugins & versions: CKEditor 5.4.0

[linear]

PT-3086

[i-just]

Hi, thanks for reporting! I raised a PR for this.

[clintonbeattie]

Same happening here. Thanks.