Users must have Sharing permissions on a Project in order to Share files from that Project.
If your Send button is greyed out or the "Get Link" option is throwing an error message, be sure you have entered a Password on a QuickLink with the Public with Password privacy setting. For security reasons, we do not support the <,>, or = characters in passwords, so also be sure to remove those character from your password.
If your Send button is greyed out or the "Get Link" option is throwing an error message, be sure you have entered a Password on a QuickLink with the Public with Password privacy setting. For security reasons, we do not support the <,>, or = characters in passwords, so also be sure to remove those character from your password.

NOTE: a Private Setting restricts access to other MediaSilo users on the account that you share projects with an entry as "Recipients." Non-users will be ignored with this setting and you will see an "Ignoring public contact" message until the setting is changed to allow non-users access.