Owncloud doesn't work

Hello,

I'm Toni from Germany.

Firstly my english isn't so good.

And i have a problem with my Server.

I installed the Owncloud service on my windows server 2012 r2. I habe PHP 7.0 and mysql server 5.1.

When I go into the Internet Explorer, on my site, I got the error message 500.

I don't find much information for my problem, maybe you can help me?

Thanks