Jetpack: 4.0: Fatal Error when updating

Created on 21 Apr 2016 · 27Comments · Source: Automattic/jetpack

In some cases, updating to Jetpack 4.0 returns the following Fatal Error:

Fatal error: Cannot find a library with slug class.media-summary. in /home/XXXXXXXXXXX/wp-content/plugins/jetpack/require-lib.php on line 35.

This was most likely introduced when we moved the file to a different location, in #2963.

The solution might be to create an empty file in the old location, as we had done in 8c3790d8cb1463a687a250b6b3d687c03a0365ca for the Jetpack Debugger.

General [Type] Bug

Source

jeherve

Most helpful comment

@jeherve this was 4.0.1. Just updated to 4.0.2 and activated without issue!

brianhogg on 21 Apr 2016

🎉2

All 27 comments

jeherve on 21 Apr 2016

Have broken site as well. Error 500. Broken only if connected to wp.com. Admin area works as expected even if connected.

slaFFik on 21 Apr 2016

@slaFFik Sorry about that! Could you try to completely deactivate and delete the plugin, and then reinstall from scratch from the Plugins menu in your dashboard, and let me know if it helps?

jeherve on 21 Apr 2016

Deactivation doesn't help (no deletion performed).
https://wordpress.org/support/topic/jetpack-400-500-error-temporary-fix?replies=5#post-8309450 fixed the issue.
So I will be waiting for upcoming 4.0.1.

slaFFik on 21 Apr 2016

Just to be clear, have you tried to delete the plugin altogether as well?

jeherve on 21 Apr 2016

I've got the same issue. I've deleted Jetpack and reinstalled it and everything is fine

mhlick on 21 Apr 2016

Fixed on my blog by disabling Publicize.

Publicize was connected only to Google+. Disconnecting and reconnecting as fixed Publicize.
I am again running with Publicize enabled.

gloubibou on 21 Apr 2016

As a note, I'm getting a slightly different error but likely related:

Fatal error: Cannot find a library with slug admin-pages/class.jetpack-landing-page. in /nas/content/live/drscott/wp-content/plugins/jetpack/require-lib.php on line 35

brianhogg on 21 Apr 2016

@brianhogg Could you let us know what version of Jetpack you're running? We've just released Jetpack 4.0.2 to address this issue.

jeherve on 21 Apr 2016

@jeherve this was 4.0.1. Just updated to 4.0.2 and activated without issue!

brianhogg on 21 Apr 2016

🎉2

so I did the update, and got a error when tryign to go into /wp-admin on line35, however I went into my file manager deleted jetpack, and then went back into my website and re installed, and seems to be working completely fine now...And it still shows all my old setup, which is cool, cause I thought once deleted everything would be gone

kat0616 on 21 Apr 2016

👍1

I am having same problem. I can not get into my wordpress screen AT ALL. On cpanel, I do not know if I can delete jetpack from there. I need help. Have worked on this new site for 6 weeks, inputting data and products. Was set to go live in 5 days. No way can I rebuild this. I need help. [email protected]. Site is marieetoile.com

JudyVandiver on 21 Apr 2016

@JudyVandiver Could you try to log in to your site via FTP or CPanel, and delete the existing Jetpack plugin folder?

You'll find the Jetpack plugin folder here:

wp-content
  plugins
     jetpack - DELETE THIS FOLDER

If you're not sure how to do this, you can ask your hosting company for help. They should also have documentation explaining how to edit or remove files from your site using FTP or a File Manager in your admin panel.

Once you've done so, you'll be able to access your dashboard again, and then go to Plugins > Add New to install Jetpack again.

jeherve on 21 Apr 2016

@jeherve
I have cpanel open ... Looking... Ok... found jetpack plug in... deleting... I"M IN!!!!! Thank you so very very much. If I install Jetpack again, will it crash it again???

JudyVandiver on 21 Apr 2016

😄1

As long as you install the most recent version of Jetpack (4.0.2), you shouldn't run into any issues!

jeherve on 21 Apr 2016

@jeherve... Ok... thank you so very much. PPL think I'm tech savvy, but only to a point, then I need help from the real tech savvy ppl. But if you want to buy homemade soaps and bath products, my new site marieetoile.com will be the place to go. Soaps I know. Tech stuff - only to a point. Going live in one week, right after hubby's cancer surgery. Again... Thank you.

JudyVandiver on 21 Apr 2016

I couldn't pull it thru my website at all, I had to go to hostgator and go into the c panel, then file manager, then plugs, then on the right in the blue folders found jetpack and deleted it.

kat0616 on 21 Apr 2016

Hello, tried with Jetpack 4.0.2 and still have the same issue : blank page on the front end and backoffice.

I tried to go back to 3.9.6 as you adviced somewhere else, but have the same problem, so backed up my files to my previous working setup (3.9.1) and this one work properly.

Yan-Alexandre on 22 Apr 2016

@Yan-Alexandre I'm sorry to hear you've run into issues.

Could you check your server error logs around the time when you experienced the issue, to find out more about the error?

If you don't know how to access your server error logs, your hosting provider should be able to help.

You can send us the errors you find via this contact form:
http://jetpack.com/contact-support/

jeherve on 22 Apr 2016

@jeherve thanks for you reply, unfortunatly my server error log is empty...
Any idea how we can monitor these trouble ? Maybe à WP code to track php errors ?

(my website is www.blenheimgang.com, but I suppose you won't see any problems going there)

Yan-Alexandre on 22 Apr 2016

Maybe à WP code to track php errors ?

Yes. Could you add the following to your site's wp-config.php file?

define('WP_DEBUG', true);

if ( WP_DEBUG ) {

        @error_reporting( E_ALL );
        @ini_set( 'log_errors', true );
        @ini_set( 'log_errors_max_len', '0' );

        define( 'WP_DEBUG_LOG', true );
        define('WP_DEBUG_DISPLAY', false);
        define( 'CONCATENATE_SCRIPTS', false );
        define( 'SAVEQUERIES', true );

}

Once you've done so, try reloading your site and then check the wp-content/debug.log file for errors.
You can send us the results via the form I linked to above, and then replace define('WP_DEBUG', true); by define('WP_DEBUG', false); in the code above.

jeherve on 22 Apr 2016

I just had this happen to my blog - not experienced with code but I did figure out how to delete from my server. When I reinstalled it crashed my blog again. So I had to delete again from my server. It all started Saturday when I went to update the plugin because it said it had an update. Then I got the server error and lost access to my admin dashboard and all visibility to the blog.

I freaked but thankfully I came across this. After deleting the second time I can see my blog and I can access my dashboard and hopefully get back to running my blog again. But I won't be installing Jetpack again until I hear that whatever is causing this is fixed. It is very scary to lose access to something that is so important to me.

Thanks for the directions on how to delete the folder.
Teresa

tigermucha on 20 Dec 2016

@tigermucha This issue was fixed back in April, in Jetpack 4.0.2. Could you make sure that you're running the most recent version of the Jetpack plugin on your site?

If you do, could you make sure WordPress is also up to date?

You should then be able to activate Jetpack again. If you keep experiencing issues, could you post the error you're seeing here?

Thanks!

jeherve on 20 Dec 2016

@jeherve Hi yes, I do have the most current Wordpress updated. It still didn't work. If I decide to add it back and get an error I will let you know. Right now I am just happy to have access back.

tigermucha on 20 Dec 2016

When attempting to activate the plugin locally, I'm getting:

Fatal error: Uncaught Error: Call to undefined function wp_parse_url()

/wp-content/plugins/jetpack/class.jetpack.php:5420