- Issue created by @matoeil
Could you please check if this plugin actually exists in your Drupal installation? Are all the permissions to that file (and its directory) correct? I've checked the package and did not see any such errors there.
- 🇫🇷France matoeil
There is a /modules/contrib/n1ed/src/Plugin/CKEditorPlugin/N1ED.php file
Probably I understood - you installed not a released version, but the module from the GIT repo. We've got the same error while testing it before publishing.
Now we've fixed all the issues in GIT and released this code as 8.x-2.64 version. Please try to install it.
Also, I recommend you always install modules from published releases only.