Hi, I'm new to Odoo, and I just finished installing this ERP on digitalocean VPS. When I click on an employee and print his/her badge, an error appear like in the screenshot.

I suspect this might have something to do with files permission because google console also produces error about cannot access resources (maybe I'm wrong). I don't know where are the physical files located. Look at the screenshot of this problem:

Https://s28.postimg.org/a5sh2e9l9/Odoo_client_error.png

Any idea how to solve this problem? Appreciate your help on this.