Inside the "Add link" dialog, there is a link "Open File Browser".
Issue: It is only visible for the main admin user with ID 1.
For any other Administrator role users, it is not visible.
Expected outcome: "Open File Browser" link is visible to other Administrators too.
System has filesystem set to private.
I've tested disabling the "Enable image upload" in the "Basic HTML" settings to see if it changes something but no luck.
I've also tested with Full HTML, no luck.
It seems that in the imce.module, the imce_process_url_element() does not fire - the URL input field does not get the data-imce-type="link" attribute, which seems to be required for the file browser popup link to be added by the imceInput.processUrlInput.
IMCE version: 8.x-2.4
Drupal version: 9.3.9
Closed: works as designed
2.4
User interface
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
I also ran into this same situation! I have other sites where that link to open the file browser shows in the regular ckeditor link dialog, but one site where it was missing. It's because I set up the private file system and needed to assign an IMCE profile for the role for private files. Thanks for the clue!