после установки SSL-сертификата сервер раз в сутки выдает - Access Forbidden

[sergmoro1]

Установил ssl-сертификат. Вроде все замечательно - https теперь, но
сервер регулярно ложится и панель mysite.ru/phpmyadmin
стала недоступна:
Cannot start session without errors, please check errors given in your PHP and/or webserver log file and configure your PHP installation properly. Also ensure that cookies are enabled in your browser.

Посмотрите, уважаемые, что не так.


/var/log/apache2/error.log

[Thu Mar 26 07:27:25.030595 2015] [mpm_prefork:notice] [pid 1134] AH00163: Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.2 OpenSSL/1.0.1f configured -- resuming 
 normal operations
[Thu Mar 26 07:27:25.047086 2015] [core:notice] [pid 1134] AH00094: Command line: '/usr/sbin/apache2'
[Thu Mar 26 07:34:22.159916 2015] [negotiation:error] [pid 1155] [client 91.221.109.101:40057] AH00687: Negotiation: discovered file(s) matching request:
/home/username/www/next-mysite/admin (None could be negotiated).
[Thu Mar 26 09:09:07.999165 2015] [mpm_prefork:notice] [pid 1163] AH00163: Apache/2.4.7 (Ubuntu) PHP/5.5.9-1ubuntu4.2 OpenSSL/1.0.1f configured -- resuming 
 normal operations
[Thu Mar 26 09:09:08.024479 2015] [core:notice] [pid 1163] AH00094: Command line: '/usr/sbin/apache2'


/etc/apache2/sites-available/mysite.conf

<VirtualHost *:443>
   ServerAdmin webmaster@mysite.ru

   ServerName mysite.ru
   ServerAlias www.mysite.ru

   DocumentRoot /home/username/www/mysite
   <Directory />
      Options FollowSymLinks
      AllowOverride None
   </Directory>
   <Directory /home/username/www/mysite>
      Options +Indexes +FollowSymLinks +MultiViews
      AllowOverride all
      Require all granted
   </Directory>

   ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/
   <Directory "/usr/lib/cgi-bin">
      AllowOverride None
      Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch
      Require all granted
   </Directory>

   ErrorLog ${APACHE_LOG_DIR}/error.log

   SSLEngine on

   SSLCertificateKeyFile /etc/ssl/private/mysite_ru.key
   SSLCertificateFile /etc/ssl/certs/mysite_ru.crt
   SSLCertificateChainFile /etc/ssl/certs/mysite_ru.ca-bundle

   # Possible values include: debug, info, notice, warn, error, crit,
   # alert, emerg.
   LogLevel warn

   CustomLog ${APACHE_LOG_DIR}/access.log combined

    Alias /document/ "/usr/share/doc/"
    <Directory "/usr/share/doc/">
        Options Indexes MultiViews FollowSymLinks
        AllowOverride None
   Require all denied
        Allow from 127.0.0.0/255.0.0.0 ::1/128
    </Directory>

</VirtualHost>


/etc/apache2/sites-available/000-default.conf

<VirtualHost *:80>
   ServerAdmin webmaster@localhost
   DocumentRoot /var/www/html

   RewriteEngine On
   RewriteCond %{HTTP_HOST} mysite\.ru
   RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI}

   ErrorLog ${APACHE_LOG_DIR}/error.log
   CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>