In order to edit text in a certain font, you will need this font to be installed on your computer. Based on the behavior you describe, I assume that you do not have Helvetica Neue installed on your computer. To edit this document, you either need to install this font (which very likely involves paying for a license), or you need to move to a computer that has this font already installed.
Thanks for your answer. But the font is installed on my computer, I checked this. So that's why I think it is strange that it is not working..
In that case, you are correct, this is very strange. Without seeing the file, it's impossible to say what's wrong, and unfortunately also how you could get around this problem.
Hi Alessandra De Praetere,
Thanks for reporting the issue. We are unable to reproduce the issue at our end.
Could you please share the file so that we can investigate it further.