HTTP ERROR 500 with Sydney Pro

I just paid $50 and installed Sydney Pro and it broke my site. Now all I get is this:

This page isn’t working
shieldslab.com is currently unable to handle this request.
HTTP ERROR 500

I deleted it and reinstalled it. Same problem. I disabled all plugins. Same problem.

Hello, please check this tutorial:

Please feel free to leave here a note if you need more help.

Kind Regards, Roman.

Hello,

I checked out that tutorial. What is my .htaccess file supposed to look
like?

matt

My host said this:

“I’ve updated your selected php version to a newer one and updated your mysql user password hash for the user that the wordpress is using.”

And that did it!