Hi,
I have added an author and contributor to my site and I have a custom post type of gallery. On the gallery custom post type I am using the ACF gallery field but when a contributor or author views the edit screen the button is displaying the browser default and when you click it, it shows your local files for upload not the media picker?
Any ideas anyone?
Only user roles that have access to the media library can upload use the gallery field. Look for a plugin that lets you alter permissions, this is one https://wordpress.org/plugins/members/, this is another https://wordpress.org/plugins/user-role-editor/ and there are others if you search the plugin repo.