Cant buy items
I ran into a bug that allowed me to amass a negative chip count and CP count, I have earned enough chips now to be on the positive for chips but my CP are still negative and I think that is why it will not allow me to purchase any new machines or tables for my casino. As well to do flooring I can put down a bunch of flooring but it will not give me the option to click the accept button.

Fixed in b23.
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Cost and affordability checks have been improved in b23.
This will help prevent you from going negative in your purchases. In the case you do, you will no longer be prevented from a purchase you can afford (if you're negative in casino points but have enough chips.)
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Animatic commented
Playing slots gives you CP. I had it once too that I was negative, but that was caused by negative income from my own casino and betting. Where I betted to very few chips remaining and after that they took money to make up for the negative income from my casino. However negative CP I haven't been able to do. What did you do to get this?