If you want to learn more about the Qweb templates, refer to the following points:

• The client-side QWeb engine has less convenient error messages and handling than other parts of Odoo. A small error often means that nothing happens, and it's hard for beginners to continue from there.
• Fortunately, there are some debug statements for client-side QWeb templates that will be described later in this chapter, in the Debugging your client-side code recipe.