I am having blank boxes on field names while generating PDF reports as shown in the screenshot with no matter language I select (even at default).

https://imgur.com/a/6xNJY

I've tried reinstalling Odoo, Adobe Reader, downloaded extended Adobe font packs, upgraded and also downgraded different versions of wkhtmltopdf around version 0.12.0 and still can't fix the problem.

I am using Odoo 11.0 community version, and everything was working well on other computers besides this one.