CoursePress will not allow me to enable WooCommerce or MarketPress

Under CoursePress > settings > MarketPress, when I select 'Use MarketPress to sell courses' and then select 'save settings' I get a white page and nothing else. when I navigate to the settings page again, that box is not checked.
I attempted this with using WooCommerce as well. Same result.

I'd like to use coursepress but if I can't sell courses through it I will have to got with another another LMS solution and drop WPMUDEV.

Thanks in advance for any tips or suggestions on this!