Problem with a pop-up flash with Nikon?

I have problem with my Nikon D3300. It's not releasing the shutter at all when the pop-up flash is up. What's solution for this problem?

Warranty service.

The auto-flash "pop-up" only works when you are shooting in the program mode.

If you want to use flash when shooting in the manual or shutter priority mode, you will have to manually open the flash. Remember to keep the shutter speed below 1/200th second or the shutter will block out some of the flash.