Hello Hasan,
I’m sorry that you’re running into this issue, but I’ll be happy to see if I can help you out with it. First, I do need to note that our extensions (such as PDF Tickets) are free additional features that we put out for our users when we can, but they are not supported.
You are correct that PDF Tickets does use the ticket email template to create the PDFs, so the attendee info should be included. Can you make sure that you’re running the current versions of Event Tickets + Event Tickets Plus (4.7.3) and The Events Calendar (4.6.17) + Events Calendar Pro (4.4.27)? After updating, make sure to clear out any caching that you might be doing on your site (such as via a plugin or on your server).
You’ll also want to run through the steps outlined here to check for any conflicts that might be occurring with your theme or another plugin.
Please let me know what you find!
Thanks,
Jennifer