Hello,
my Problem ist: After login i get a message "cannot load required data files. The Problem is on my Laptop. On my PC i dont have Problems. I deinstalled the Programm and install again, but it doesn´t work
I’m going to turn this into a ticket so we can work with your further individually. Keep an eye on your email, and thanks for the report!
The same for me 
Martins, did you submit a support ticket? You can do so via bit.ly/zwiftsupport
Send us your log files with your ticket, too. Thanks!
Hi, Jason. Yes, I did it before that post. 
Waiting for help…
Changed video card from Nvidia 7300GT to Radeon HD3650, and now it is starting.
Exactly the same problem here on a late 2016 Macbook Pro 13" running Windows 10 under bootcamp.
I’ve paid the money but can’t access the service. Not a great experience.
@Chris: We don’t support Zwift under bootcamp. You should use the native Mac client instead. If you’re still having problems, submit a support ticket, and we’ll help you sort it out.
Closing old thread.