I see this was closed quite a while ago but I've recently run into this problem as well and was able to work through it.
- Add the Styles option to the CKEditor 5 toolbar
- An error is presented as follows:
"Enable at least one style, otherwise disable the Style plugin.
The following attribute(s) can optionally be supported by enabled plugins and should not be added to the Source Editing "Manually editable HTML tags" field: Style ()."
In my case I had a number of elements that allows 'class' attributes through Source editing (for instance lists, links etc). By systematically removing each class reference from the Manually editable HTML tags, I arrived at a point where the Styles option appeared and I could start to create styles.
I found that for any plugin in the toolbar that could support a class, the manually editable class on that element must be removed in order to use the styles dropdown option.
I have another system where the styles were enabled prior to moving to CKEditor 4 and therefore the option to add configurable styles was already present although error message were displayed until I cleaned up the manually editable tags.
In retrospect the error message is correct, however suggesting as the first step to enable a style to correct the problem is confusing since there is no place to do that until you fix the second step. Perhaps suggesting removing class attributes from manually editable tags for all enabled plugins in the toolbar before you can use the styles plugin would be helpful.
I don't know if this will help anyone but it was the missing piece for my system: https://www.drupal.org/project/drupal/issues/3368769 🐛 10.1.x breaks Nginx + PHP-FPM with too many redirects even when nginx config is changed Closed: works as designed
Ok, so more testing reveals this totally makes sense.
When logged into server 1 the shared closed form form will still display and be accessible.
Logout of server 1 and the closed form message appears and the form is no longer accessible.
I wasn't keep track of where I had access, but the cookies were.
namscott → created an issue.
This patch worked for authenticated users but anonymous users still see duplicate titles.
I manually applied the patch and still had to go in and change /dist/ to /6.x/ and add the .min did I miss something?