.htaccess has stopped working?

[tbrady85]

I have SSL enabled on my Sentora installation for my panel and all of my websites.  I also have my .htaccess setup so that all http requests forward to https.  Everything has been working great since initially setting this up. As I matter of fact I logged into my panel yesterday to check my webmail.  Outside of checking my webmail I haven't made any changes to my server or my Sentora install. 

All of sudden, tonight, I go to log into my panel and I start receiving: 

Code:

Bad Request

Your browser sent a request that this server could not understand.
Reason: You're speaking plain HTTP to an SSL-enabled server port.
Instead use the HTTPS scheme to access this URL, please.
Apache Server at panel.breeviate.com Port 443

I checked the rest of my domains and now all of them are receiving this message.

I verified my .htaccess was being read by Apache by breaking it and receiving an Internal Server error.

Now I have two questions:

1.  What can I do to correct this?
2.  What could have caused this to happen without any interaction from me?

Here's what's in my .htaccess file (again this was working fine until today).

Code:

RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301]