Concrete5: Installed, looked great yesterday. Today: 500 Internal Server Error

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Installed Concrete5 v8.4.5 at http://doontoon.com yesterday and set things up. It was working fine.

Today, I just get 500 Internal Server Error.

.htaccess and config.php look normal.

I've increased PHP max_input_time to 120.

I'm out of ideas!

Apache Version 2.4.39
PHP Version 7.2.19
MySQL Version 10.2.25-MariaDB

facechomp
 
Gondwana replied on at Permalink Reply
Gondwana
This is a long shot, but I'm wondering about your server's HTTPS setup (certificate, routing, etc).
facechomp replied on at Permalink Reply
facechomp
Thanks for your suggestion.

I reviewed my SSL certificate, and then changed my nameservers to point to Cloudflare.

I'm still getting the 500 Internal Error, though. :(
Gondwana replied on at Permalink Reply
Gondwana
When I try to go to the link you posted, it redirects to https then reports 'secure connection failed: 'An error occurred during a connection to doontoon.com. Peer’s Certificate has been revoked. Error code: SEC_ERROR_REVOKED_CERTIFICATE'. This leads me to think there's something wrong before c5 even gets going, at least for me.

This could be a red herring, though.
facechomp replied on at Permalink Reply
facechomp
It's working now! (for me). Do you mind checking?

I'm hoping the change to Cloudflare, and reviewing my SSL and DNS settings have solved this... although it seems intermittent.
Gondwana replied on at Permalink Reply
Gondwana
Same error as before for me, but it could take a while for DNS propagation to occur...

...especially to Australia.
facechomp replied on at Permalink Reply
facechomp
I clicked "Extend Concrete5" and the problem is back for me. :(