Problem with encoding

Hello,
if I send data from Gravity form to Highrise, I see everything in Highrise but it looks like: ěš???ýáíéú? (correctly: ě????yáíéú?) It’s only just testing of czech characters. It’s problem with encoding, isnt it?

Do you now where is the problem? What can I change to see correctly characters?

Thank you so much!

Martin

https://www.ads-software.com/plugins/gravity-forms-highrise-crm/