Why is there toilet paper in my sump pump basin?

My sump pump recently broke I opened up the basin and it was full of this white material. As I was cleaning it out i realized it was toilet paper. We recently had a toilet put in our basement. The pipes and everything had been there since we moved in about 8 years ago, but we just only recently decided to put a toilet. Now the pump turns on but won't run. (I am now thinking it is clogged with toilet paper). There is also fecal matter and whatever else runs through that toilet. I'm not a handy man nor plumber nor do I know about sewage systems but i feel like this definitely shouldn't be happening.