ちなみにFlexibleにするとCloudflareからの通信は80番に変換されるので、サーバ側で80 -> 443リダイレクトを掛けてるとおかしなことになってリダイレクトループになるよ https://support.cloudflare.com/hc/en-us/articles/203487280--How-do-I-fix-the-infinite-redirect-loop-error-after-enabling-Flexible-SSL-with-WordPress-
support.cloudflare.comHow do I fix mixed content issues or the infinite redirect loop error after enabling Flexible SSL with WordPress?Some users may experience redirect loops or mixed-content errors after installing Cloudflare's SSL service on their website.
These issues are most often associated with users of Cloudflare's Flexib...