In the Universal Email Wizard, select the Option on the first page to Create a page for the email message and select one of the availabel templates.
As for the error messages, this will happen if there are blank line between php code block.
look for a blank line between code blocks at line 4. See the following page for more details:
extra code should not need to be added, but it does need to be added in your case.
It looks like your server is running php 4.3 or earlier which does not define the session_commit() function.
I am logging a bug to have the code added in a future update.