The text editor in Lottie Editor doesn't work

When I want to change the text of a button animation from ‘Sumbit’ to ‘Free’ none of the letters from the word free show up. I have tried deleting and updating the animation letter after letter, and I thought it worked. But it didn’t after the first ‘e’ of the word ‘Free’. My friend has the same problem, but when we look up the problem it seems to work just fine for everyone. Does anybody know how to fix this? Thanks in advance

There is something about the subject I’ve realized. There are some letters that don’t work. For example when I try to change a text to ‘Gates’ the letters g and s don’t show up and it would look like ‘ate’. So it cancels out only some letters. Does anybody know how to fix this?