[Typo3-shop] tt_products, not showing content

[yvonne]

Hello

I installed tt_products 2.3.8 local and I use Typo 3.8.0. All tables are 
installed.
I followed the tutorial. In the shop template I wrote in "Constants" the 
path to the template file: plugin.tt_products.file.template = 
fileadmin/templates/awzkmain/products_eur.tmpl

The shop page includes the plugin (List) and the sysFolder as starting 
point.

When I want to see the page including the shop, Typo3 only shows a blank 
site, no error or warnings. I guess it could be a template problem. But 
don't know, how to fix that.

Any ideas?

Thanks,
yvonne