Installed WampServer .... Any ideas?
Yes. You may enable that setting simply (left) click once on the WampServer icon, choose PHP -> PHP settings -> short open tag. Wait for a second, then WampServer will automatically restart your PHP and also its web service.
If this short open tag setting has not been checked before, then it should been checked now (after you follow that step above). By using this technique, you don't have to edit your php.ini file.
In the other words, make sure this short open tag setting has been checked/selected in order to run your osTicket properly by looking it into the menu belongs to the WampServer's icon.
Have a nice try!
Sincerely,
Masino Sinaga