I have attempted to install domain mapping in my wordpress multisite but it's not working

I have tried to install the domain mapping plugin in this site for use with multisite..

the site is http://cg-o.com and the multi site I'm trying to have mapped is http://cg-o.com/choosegrowthbook/

I want the domain http://choosegrowthbook.com to be mapped to the http://cg-o.com/choosegrowthbook/

I have created an A record on godaddy pointing to

Hope that makes sense... Let me know if you need any other info from me!!