Perhaps Misspelled or Defined by a Module Not Included in the Server Configuration

I found Apache error message like as perhaps misspelled or defined by a module not included in the server configuration.

I search many site and get more result. So I will be share this solution.

That means ssl engine problem.

Find your server error message from command.

$ tail -f /var/log/apache2/error.log

Output below:

systext error on line 17 of /etc/apache2/apache.conf:
Invalid command 'Action', perhaps misspelled or defined by a module not included in the server configuration
Action 'configtest' failed.
The Apache error log may have more information.
...fail

Solution : Run below two command on your server.

$ a2enmod ssl

$ service apache2 restart

If any error please comment below. I will be reply within 24 hour.