Powertools Site: 404 - Page does not exist

Hi all,

I have a problem with the powertools site. I customized the yacceleratorstorefront (electronics) for a demo (it's working fine) and now I'm not able to start http://powertools.local:9001/yb2bacceleratorstorefront/?site=powertools (look at the screenshot). While opening the website cmd doesn't display any errors. May you tell me what I have to check to find the cause? I'm using the commerce-suite 5.2.0.1.

Thanks and best regards, Yulia