Hi and welcome to JustAnswer,
Please remove your k-cup then press brew. If still, no water comes out. It possibly have airlock in the pump and water intake system, remove your optional water filter if any.
Sometimes you need to get rough on your machine in able to remove the clog air on water line. slamming the water tank into machine sometimes help. If still, unplug your machine, remove water and turn the machine upside down or shake your machine if possible.
Let me know if you still have questions. Just reply before rating.
If still, try to clean the k-cup needle using paper clip. CLICK HERE to watch video
Hope this information will be helpful.
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