Help text bubble is empty and smarty errors when .hlp file is missing for settings forms
For example Administer - CiviMail - Mailer Settings.
I think this is related to the move towards generic settings in #495, but at the moment looking at the related code it looks like help_text still depends on there being a corresponding .hlp file in the templates folder.
Even when there is help_text in the definition, it comes out like <a class="helpicon" title=" Help" aria-label=" Help" href="#" onclick="CRM.help("", {"id":"civimail-sync-interval-id","file":"CRM\/Admin\/Form\/Setting\/Mail"}); return false;"> </a>
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information