PDF invoice special sharacters

[gradencan]

Hello!

I have Virtuemart 3.0.9. VM generates me pdf invoices, but the text does not contain special characters: "Č". It puts "?" instead.

I read this topic, which describes the same problem, but answer did not work for me.
https://forum.virtuemart.net/index.php?topic=99783.0

Could please anyone help me? Thanks a lot!