"The resource you are looking is not avaible"

Im trying return an email to my print format.
'Email: {% set u = frappe.get_doc(“Quotation”, doc.quotation)%}
{{ u.contact_email}}


Why this is happening to me?

A forum search suggests you may have a caching issue?

I would try these -
‘bench clear-cache’
logout and login to your instance
open a new or different web browser