SSL Certificate Error Resolution

I need assistance in resolving SSL certificate errors on both Google Sites and Squarespace. Both platforms require equal attention to ensure secure and error-free access.

In Google Sites the error states: "This custom domain is missing its certificate. Please delete and recreate the assignment."

In Squarespace the error states: "SSL certificates aren't currently available for the domains below. If it's been longer than 48 hours, there could be an issue with these domains."

But weirdly, external SSL checkers and my naive checks indicate nothing is wrong. And the website seems to be functioning normally.

Key Requirements:
- Expertise in troubleshooting SSL certificate issues on Google Sites and Squarespace.
- Ability to diagnose and resolve errors efficiently.
- Understanding of potential changes or settings that may affect SSL certificates.

Ideal Skills and Experience:
- Proven experience in handling SSL certificates and resolving related errors.
- Familiarity with both Google Sites and Squarespace platforms.
- Strong problem-solving skills and attention to detail.

Please include your relevant experience in your application.