CKEditor JS error when source editing plugin disabled

Current issues should target the dev branch.

I ran into this same issue with a Drupal 10 upgrade. A text format didn't have the source editing enabled and CKEditor was failing to load on pages where it was used. The following error was printing in the browser console.

ckeditor5.js?s2u53n:477 CKEditorError: plugincollection-soft-required {"missingPlugin":"SourceEditing","requiredBy":"SourceEditingCodeMirror"}
Read more: https://ckeditor.com/docs/ckeditor5/latest/support/error-codes.html#error-plugincollection-soft-required
    at ckeditor5-dll.js?v=39.0.1:5:99918
    at ckeditor5-dll.js?v=39.0.1:5:100062
    at Array.forEach (<anonymous>)
    at u (ckeditor5-dll.js?v=39.0.1:5:99864)
    at ckeditor5-dll.js?v=39.0.1:5:98495
    at Array.reduce (<anonymous>)
    at e (ckeditor5-dll.js?v=39.0.1:5:98446)
    at l.init (ckeditor5-dll.js?v=39.0.1:5:98571)
    at D.initPlugins (ckeditor5-dll.js?v=39.0.1:5:105102)
    at editor-classic.js?v=39.0.1:4:9630
(anonymous) @ ckeditor5.js?s2u53n:477
Promise.catch (async)
attach @ ckeditor5.js?s2u53n:471
Drupal.editorAttach @ editor.js?v=10.1.5:302
(anonymous) @ editor.js?v=10.1.5:226
attach @ editor.js?v=10.1.5:209
(anonymous) @ drupal.js?v=10.1.5:166
Drupal.attachBehaviors @ drupal.js?v=10.1.5:162
(anonymous) @ big_pipe.js?v=10.1.5:118
(anonymous) @ big_pipe.js?v=10.1.5:138
12:14:35.818 

The patch resolved the issue.

Not setting to RTBC since there are failing tests, but I think the fix is correct.

The last submitted patch, ckeditor_codemirror__add_dependency_of_sourceEditing.patch, failed testing. View results →

I think module should not load code mirror plugin is source code plugin is not enabled for particular Text format configuration.

Can confirm that I was seeing the same behavior (CKEditor would not load if CodeMirror plugin/Source Code button disabled). This patch resolves the issue.

Thanks, all!

Automatically closed - issue fixed for 2 weeks with no activity.

Just hit this, thanks for the fix. Upgrading now.