Browser can't connect to domain ... Any tools to debug?

Hey geeks!
Got an issue with only one domain in my account with Secure connection.
The domain is vityle-com and all the settings are absolutely same as other domains that work and this one isn’t

Maybe you have some advice how to find the issue with it.

Would really appreciate any type of advice here.

Thank you very much!

As of now, there’s a SSL issue. Fix is here: