Problem: updated Pro9.5 to Pro10

I just updated my Cubase Pro 9.5 to Pro10 yesterday and I got a big problem.
The Cubase Pro 10 can’t open many projects but still can open in Cubase Pro 9.5

What should I do?

Purchase Detail - Order No.214765305
Order Date: 18/11/2018
Order Number: 214765305

Windows10 64-bit
CPU i7-8700 3.2GHz. Ram 32GB

It’s likely a plugin issue with one of your plugins. Are you using Autotune?

Thank a lot for your advice.
I can fixed it by removed some plugins.