Transactional Email List in Magento is Empty

[fglecho]

I wanna  edit the default email template , but I got a problem:

system -> transactional email -> new template, then default template not loading

There only is a template dropdown button. The dropdown list is blank. 

Magento 1.9.1

[fglecho]

This is system.log:

2015-05-22T04:35:29+00:00 ERR (3): Warning: include(Mage/Inventory/Helper/Data.php): failed to open stream: No such file or directory in /home/mobilestation/web/mobilestation.co.nz/public_html/lib/Varien/Autoload.php on line 94
2015-05-22T04:35:29+00:00 ERR (3): Warning: include(): Failed opening 'Mage/Inventory/Helper/Data.php' for inclusion (include_path='/home/mobilestation/web/mobilestation.co.nz/public_html/app/code/local:/home/mobilestation/web/mobilestation.co.nz/public_html/app/code/community:/home/mobilestation/web/mobilestation.co.nz/public_html/app/code/core:/home/mobilestation/web/mobilestation.co.nz/public_html/lib:.:/usr/share/pear:/usr/share/php') in /home/mobilestation/web/mobilestation.co.nz/public_html/lib/Varien/Autoload.php on line 94

[e.interjeruvizija.lt]

If you have Magestore Inventory

After disable all Magestore_Inventory*.xml  files transactional email working fine. 

Or you can fix it yourself by edit file
/app/code/local/Magestore/Inventorypurchasing/etc/config.xml
then edit line 260-267 module="inventory" => module="inventorypurchasing"

Best Regards