Certificate style does not work

I've pushed my site to staging, disabled all plugins except WPMUDEV Dashboard and Coursepress Pro, and changed the them to the default 2016. I still get the same results. None of the styling that I apply will work on the certificate, not even text-align. This is a staging site, so do whatever you like, but please let me know what you do so that I can duplicate it on my live site. Thanks.

I've granted access via the WPMUDEV dashboard.