Below is the attached pdf file which i am opening in your dummy project but the text is not visible you can open the same pdf in google chrome or any other pdf viewer all the text will be visible to you.
we found the issue: you should create "stdFont" and "stdRes" folders in "fdat".
In stdRes folder you should move 00,01,02,03,04,05,06,07,08,09,10,11,12,13 files.
In stdFont folder you should move the .ttf files.
We will fix this project structure issue both in demo project and Swift guide.
Thank you for your report.