Script times out – Mayashop theme

Hi

I have a clean installation of WP, which runs fine. But when I install the Mayashop theme (https://themeforest.net/item/mayashop-a-flexible-responsive-ecommerce-theme/2189918), I can’t no longer access the site – it times out.

I have made an xdebug log, and as you can see on my screenshot (https://majbom.com/files/maya-error.png), it seems like it’s some json-code which generate this issue.

The site is installed on a ubuntu server with nginx and php5-fpm.
I have another server with pretty much same setup, but here’s no problems with wp3.8 and the mayashop theme.

As soon as I select the standard theme again, it all works fine.

Does anyone have a clue on what might be wrong?
Just poke me, if you need additional information ??

Thanks in advance