Mamba Negra

I will consider this plugin. Thanks for help.

Yes, I have installed this plugin in my site: https://codecanyon.net/item/timetable-responsive-schedule-for-wordpress/7010836
but I won’t to uninstall it, I like it.
I can wait for new Jetpack release, I’m looking forward to it.
Thanks for response.
Regards.

Now I have 4.5 version installed and activated, after few attempts and installing older versions.
But the design is broken, is possible that some CSS file is missing or corrupted with all this troubles? I have backups of the database, might be the solution try to install an older version of database? Some ideas for fixing the problem?

I have this errors in debug.log:
[23-Jan-2017 10:31:10 UTC] PHP Fatal error: Cannot redeclare class Upcoming_Events_Widget in /hosting/www/kravmagaleon.com/public/wp-content/plugins/jetpack/modules/widgets/upcoming-events.php on line 153
[23-Jan-2017 10:31:32 UTC] PHP Fatal error: Cannot redeclare class Upcoming_Events_Widget in /hosting/www/kravmagaleon.com/public/wp-content/plugins/jetpack/modules/widgets/upcoming-events.php on line 153

And I receive this notification email:
…did not load when we checked, on Lunes, enero 23, 10:33 am.

Your server is not responding to our monitoring requests. Your site may have PHP fatal errors, database connectivity issues, or other server-level problems. This page might help you figure out what is causing the problem.

If you continue seeing downtime, you should get in touch with your hosting provider for help. You will receive another alert when your site is online again.

And when I try to activate ‘Extra Sidebar Widgets’ I get this error:
Extra Sidebar Widgets failed to activate. SyntaxError: Unexpected end of JSON input

[23-Jan-2017 10:53:24 UTC] PHP Fatal error: Cannot redeclare class Upcoming_Events_Widget in /hosting/www/kravmagaleon.com/public/wp-content/plugins/jetpack/modules/widgets/upcoming-events.php on line 153

• This reply was modified 7 years, 10 months ago by Mamba Negra.
• This reply was modified 7 years, 10 months ago by Mamba Negra.

Today, my site wakes up in HTTP ERROR 500, and with this log:

[19-Jan-2017 17:40:02 UTC] PHP Notice:  get_currentuserinfo is <strong>deprecated</strong> since version 4.5.0! Use wp_get_current_user() instead. in /hosting/www/kravmagaleon.com/public/wp-includes/functions.php on line 3828
[19-Jan-2017 17:40:03 UTC] PHP Notice:  get_currentuserinfo is <strong>deprecated</strong> since version 4.5.0! Use wp_get_current_user() instead. in /hosting/www/kravmagaleon.com/public/wp-includes/functions.php on line 3828
[19-Jan-2017 23:09:18 UTC] Array
(
    [akismet_debug] => Array
        (
            [akismet_url] => https://rest.akismet.com/1.1/verify-key
            [http_args] => Array
                (
                    [body] => key=0&blog=http%3A%2F%2Fwww.kravmagaleon.com
                    [headers] => Array
                        (
                            [Content-Type] => application/x-www-form-urlencoded; charset=UTF-8
                            [Host] => rest.akismet.com
                            [User-Agent] => WordPress/4.7.1 | Akismet/3.2
                        )

                    [httpversion] => 1.0
                    [timeout] => 15
                )

            [response] => Array
                (
                    [headers] => Requests_Utility_CaseInsensitiveDictionary Object
                        (
                            [data:protected] => Array
                                (
                                    [server] => nginx
                                    [date] => Thu, 19 Jan 2017 23:09:18 GMT
                                    [content-type] => text/plain; charset=utf-8
                                    [content-length] => 7
                                )

                        )

                    [body] => invalid
                    [response] => Array
                        (
                            [code] => 200
                            [message] => OK
                        )

                    [cookies] => Array
                        (
                        )

                    [filename] => 
                    [http_response] => WP_HTTP_Requests_Response Object
                        (
                            [response:protected] => Requests_Response Object
                                (
                                    [body] => invalid
                                    [raw] => HTTP/1.1 200 OK
Server: nginx
Date: Thu, 19 Jan 2017 23:09:18 GMT
Content-Type: text/plain; charset=utf-8
Content-Length: 7
Connection: close

invalid
                                    [headers] => Requests_Response_Headers Object
                                        (
                                            [data:protected] => Array
                                                (
                                                    [server] => Array
                                                        (
                                                            [0] => nginx
                                                        )

                                                    [date] => Array
                                                        (
                                                            [0] => Thu, 19 Jan 2017 23:09:18 GMT
                                                        )

                                                    [content-type] => Array
                                                        (
                                                            [0] => text/plain; charset=utf-8
                                                        )

                                                    [content-length] => Array
                                                        (
                                                            [0] => 7
                                                        )

                                                )

                                        )

                                    [status_code] => 200
                                    [protocol_version] => 1.1
                                    [success] => 1
                                    [redirects] => 0
                                    [url] => https://rest.akismet.com/1.1/verify-key
                                    [history] => Array
                                        (
                                        )

                                    [cookies] => Requests_Cookie_Jar Object
                                        (
                                            [cookies:protected] => Array
                                                (
                                                )

                                        )

                                )

                            [filename:protected] => 
                            [data] => 
                            [headers] => 
                            [status] => 
                        )

                )

        )

)