Odoo issue with online signature drawing area -- 3

Job ID: 33898475

Budget: $10 – $30 USD

I have Odoo 12 Community. Few days ago i enabled the native option on Settings "Online signaure" to enable the option to sign the sales butgets drawing manually.
but now, when i click on Accept and Sign, (Aceptar y firmar) don't appears the signature drawing area.
i attach a word document with a link to check it. Seems perhaps a javascript issue?
Related categories: JavaScript Odoo