Hello i have a problem when i send quotations from the sales modules where it should appear a button inside the email sent so the user can access to the sales order but the button it isn't showing as is shown in the image (the button should appear where the arrow is just like the default templates but it isn't showing):
https://drive.google.com/file/d/1RPBEOwEWK1QQXrYFCKhyk24cESY2fbWn/view?usp=sharing 

I already reset the templates of the sales order quotations and still isn't working please help, thanks in advance