WordPress 5.0 Network Dashboard Page Loading Problem

I just updated my WordPress MultiSite network to 5.0 and I already see a problem. When I am browsing the pages in the network dashboard, they take FOREVER to load up. When I am un a single site dashboard, the pages load very fast. I already installed the WP Super Cache plugin and this is what I got. I have never ever had this kind of problem before. Does anyone know what is wrong and a possible way to fix this?