[16.0] JS error when opening the template editor

[flotho]

Hi,

thanks for this awesome module.

On runboat http://oca-sign-16-0-31c002fb6bdb.runboat.odoo-community.org/web#res_model=sign.oca.template&res_id=3&cids=1&menu_id=105&action=sign_oca_configure&active_id=3 I have this issue when opening the template

UncaughtClientError > TypeError
Uncaught Javascript Error > page is undefined

Moreover hen I click on the copy to clipboard button I have the same issue :

[kobros-tech]

I guess I handled these probable errors in 18.0, we are doing some improvements in 16.0 and will handle these errors too.