Getting error 'Capacity exceeds maximum capacity. Parameter name: capacity' (4377405)

Getting the below mentioned error when configuring mail alert.

• 'Capacity exceeds maximum capacity. Parameter name: capacity'

Application: ChangeAuditor.exe

Framework Version: v4.0.30319

Description: The application requested process termination through System.Environment.FailFast(string message).

Message: Capacity exceeds maximum capacity.

Parameter name: capacity

Stack Trace:

at System.Security.SecureString.EnsureCapacity(Int32 capacity)

at System.Security.SecureString.AppendChar(Char c)

at Quest.Win.SecureTextEditor.set_SetSecureText(String value)

at ChangeAuditor.RepositoryConfigurationControl.LoadData()

at ChangeAuditor.AlertCustomEmailForm.LoadDefaultData()

at ChangeAuditor.SearchPropertiesControl.ultraButtonAlertEmail_Click(Object sender, EventArgs e)

at System.Windows.Forms.Control.OnClick(EventArgs e)

at Infragistics.Win.Misc.UltraButtonBase.OnClick(EventArgs e)

at Infragistics.Win.Misc.UltraButton.OnMouseUp(MouseEventArgs e)

at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)