I don't think so. But setting WP_SITEURL and WP_HOME as below wouldn't hurt:
Check our documentation here
That is probably because your SSL certificate was configured at Cloudflare level. Once you enable CloudFlare again the issue will be fixed. Right now, when you access is using the apache configured certificate that expired on 11 June 2019.
About the blank screen, I see a lot of Pagespeed errors in the apache error log. Can you try to disable it?