My Lightsail just undergone maintenance. After maintenance reboot, my 3 domains won't load.

I am seeking a freelancer who can help me with an issue I am experiencing after a maintenance reboot on my Lightsail. My 3 domains are not loading and I am seeing a Cloudflare Error 522 message. I have already checked the DNS settings for my domains and everything seems to be correct. There have been no recent changes or updates made to the domains or server before the maintenance reboot.

Ideal Skills and Experience:
- Strong knowledge of Lightsail and DNS settings
- Experience troubleshooting Cloudflare errors
- Familiarity with server maintenance and reboot processes