SharePoint 2013 Server Store Error

I am facing problem in SharePoint Store and getting ERROR.

I am configuring SharePoint 2013 on a new SharePoint Server's environment and it was working well, I was able to download and install some Applications and thought I would do it a next day and I had accomplished something.
The next day I start to complete, I tried to Add an App and received this error.
Sorry, we can't seem to connect to the SharePoint Store.
Try again in a bit.
