Network Admin

Greetings from Nevada, I am getting back into a website I have been trying to get up for a couple of years. Back then I put a multisite network (not sure this is what it is called up). Now I want to get rid of that option but I do not want to get rid of the materials I have developed in grantlessons.org I want to use Visual Composer but it will not load onto a multisite. I am unclear as to what needs to be done. Any help that can be given to me is greatly appreciated. Thanks in advance for your kind attention. Sandie