Most likely, it's the ejector rod come loose. it has left handed threads on it. someone will be along shortly to give you a good way to retighten it. the guy's here are great.
You can try to screw the ejector rod counter clockwise & see if it moves. it has left handed threads. if that is the problem. it should screw back down. then the cylinder should open.
Go her open and the ejector rod was tight. Seems the bolt was sticking at the end of the stroke. Need to clean the hole for gunk. Thanks again for the help.