I have installed SharePoint 2013, and configured a team site.
I am able to add default app like list and document library. But when I try to add some app from the SharePoint store, I get a message that the apps are turned off and contact your system administrator.
I researched a little in the internet and it said that I have to create a dedicated app domain to avail this feature.
Let me know few insights regard this. Thank you
There is a great TechNet Article on Configure an environment for apps for SharePoint (SharePoint 2013)
Apps rely on the App Management and Microsoft SharePoint Foundation Subscription Settings service applications. These service applications use the multi-tenancy features to provide app permissions and create the sub domains for apps
You'll need to create a Web Application for your Apps to be hosted in and run.
Other than that double check your SSL certificates.
Let us know if have an issue.
Regards,
Vince