API Deprecation
Lots of these in the log for mailings
[warning] Deprecated function CRM_Mailing_BAO_MailingComponent::retrieve, use API. CRM_Core_Error::deprecatedFunctionWarning CRM_Mailing_BAO_MailingComponent::retrieve CRM_Mailing_Form_Component::setDefaultValues CRM_Core_Form::buildForm Array ( [civi.tag] => deprecated )
Trying to make an email template, and I get this.
Wish I could help more.