Magento: Email template crashes new template form - zend-framework

Question

I have a module that I'm trying to use with an email template I created. I created the .phtml template directly (not through the new template form on the backend) into the locale > en_US > template > email folder. The template seems to work as the variables passed to it work and the email gets sent fine. My only problem is that now when I go into the management > Transactional Emails > New Template, the page crashes. The dropdown is empty and everything after it does't get rendered.
I think it might have something to do with the way I'm loading the template in the modules config.xml. When I remove the reference to the template the problem goes away. Put the reference back in and the form crashes..
Config.xml
<?xml version="1.0"?>
<config>
<modules>
<Optimise_Requestcallback>
<version>0.1.9</version>
</Optimise_Requestcallback>
</modules>
<frontend>
<routers>
<requestcallback>
<use>standard</use>
<args>
<module>Optimise_Requestcallback</module>
<frontName>request-callback</frontName>
</args>
</requestcallback>
</routers>
<layout>
<updates>
<requestcallback>
<file>optimise.xml</file>
</requestcallback>
</updates>
</layout>
</frontend>
<global>
<template>
<email>
<requestcallback_template translate="label" module="requestcallback">
<label>Optimise RequestCallback</label>
<file>requestcallback_template.html</file>
<type>html</type>
</requestcallback_template>
</email>
</template>
</global>
</config>
Here is how I send the email:
public function sendemailAction() {
$emailTemplate = Mage::getModel('core/email_template')
->loadDefault('requestcallback_template');
$emailTemplateVariables = array();
//Fetch submited params
$params = $this->getRequest()->getParams();
$subjectOfMail = "Request a Callback from the Puji Website<br /><br />Product = " . $params['product'] . "<br />Name = " . $params['name'] . "<br />Email = " . $params['email'] . "<br />Telephone = " . $params['telephone'] . "<br />Message = " . $params['comment'];
$emailTemplateVariables['body'] = $subjectOfMail;
$emailTemplate->setSenderName($params['name']);
$emailTemplate->setSenderEmail($params['email']);
try {
$emailTemplate->send('billy#optimiseweb.co.uk', 'Sales', $emailTemplateVariables);
Mage::getSingleton('core/session')->addSuccess('Thank you! We will contact you very soon.');
} catch (Exception $ex) {
$translate->setTranslateInline(true);
Mage::getSingleton('customer/session')->addError(Mage::helper('contacts')->__('Unable to submit your request. Please, try again later'));
$this->_redirect('*/*/');
return;
}
//Redirect back to index action of (this) activecodeline-simplecontact controller
$this->_redirect('request-callback/');
}
And the template itself probably couldn't be any simpler!
<!--#subject Request a Callback from the Puji Website #-->
{{var body}}
Can anyone see an issue here that would cause the New template form to crash?

Answer 1

There can be various reasons, but first check config.xml file for each custom module, one-by-one.
There must be one module, where you will find code like:
module="[some-module-name-here]"
Try removing this code one-by-one and reload the transactional e-mail template form again.
I am sure, it will solve the problem.