Hello, after deleting a user from a Role (Group) the e-mail that is supposed to inform this user is not send, the following error occurs:

DotNetNuke.Services.Exceptions.ModuleLoadException: The specified string is not in the form required for a subject. ---> System.ArgumentException: The specified string is not in the form required for a subject. at System.Net.Mail.Message.set_Subject(String value) at System.Net.Mail.MailMessage..ctor(String from, String to, String subject, String body) at DotNetNuke.Services.Mail.Mail.SendEmail(String fromAddress, String senderAddress, String toAddress, String subject, String body) at DotNetNuke.Services.Mail.Mail.SendMail(UserInfo user, MessageType msgType, PortalSettings settings) at DotNetNuke.Modules.Admin.Users.ManageUsers.MembershipAuthorized(Object sender, EventArgs e) --- End of inner exception stack trace ---

Probably this could be because the language of the web site is not English and the English (US) language is disabled?