stalls cloudflare blamed

running a wordpress quiz from Thrive Themes at and am having problems where quiz won’t load or cant reach server and host support says it is Cloudflare fault. First occurrence we purged cache that worked good to go, but over 10 hours later quiz will not load. We pause Cloudflare good to go again. Please advise on how we can configure Cloudflare so this problem will not occur OR advise on what me problem from host server side. Hope that makes sense thanks