Issue with Woocommerce 3.6.1 / WPML 4.6.0 – Internal Server Error

I have the same problem!

I have confirmed that the problem is related to WPML / Woocommerce combination. I have deactivated all plugins and reactived them one by one. The problem appears when WPML is activated.
Please fix this a.s.a.p. because I cannot update any products in this way.

Hello @danielbuvens and @schaum
Please make sure that you are using the latest WPML version of all WPML plugins.
Usually, internal server error leaves something in the logs, if you can provide that information we would be able to tell you what to do and if it is a bug to fix it.
To do that, please enable debugging in WordPress
I suggest enabling debug in WordPress and checking the debug log.

You can do this by setting these options in wp-config.php
above the line that says:

/* That’s all, stop editing! Happy blogging. */

// Turn debugging on 
define('WP_DEBUG', true); 
// Tell WordPress to log everything to /wp-content/debug.log 
define('WP_DEBUG_LOG', true); 
// Turn off the display of error messages on your site 
define('WP_DEBUG_DISPLAY', false); 
// For good measure, you can also add the follow code, which will hide errors from being displayed on-screen 
@ini_set('display_errors', 0); 

Please do note to remove any other instances of this code if you have it in the file:
define(‘WP_DEBUG’, false);

I added this code to wp-config.php but there is no relevant content in /wp-content/debug.log

• This reply was modified 5 years, 7 months ago by danielbuvens.

[23-Apr-2019 12:43:25 UTC] PHP Notice: Undefined index: post_type in /var/www/vhosts/canyonstore.eu/httpdocs/belgium/wp-content/plugins/woorewards/include/unlockables/coupon.php on line 359
[23-Apr-2019 12:45:22 UTC] PHP Warning: Illegal string offset ‘display_name’ in /var/www/vhosts/canyonstore.eu/httpdocs/belgium/wp-admin/includes/plugin-install.php on line 737
[23-Apr-2019 12:45:22 UTC] PHP Warning: Illegal string offset ‘profile’ in /var/www/vhosts/canyonstore.eu/httpdocs/belgium/wp-admin/includes/plugin-install.php on line 743
[23-Apr-2019 12:45:22 UTC] PHP Warning: Illegal string offset ‘avatar’ in /var/www/vhosts/canyonstore.eu/httpdocs/belgium/wp-admin/includes/plugin-install.php on line 744
[23-Apr-2019 12:57:32 UTC] PHP Notice: Undefined index: post_type in /var/www/vhosts/canyonstore.eu/httpdocs/belgium/wp-content/plugins/woorewards/include/unlockables/coupon.php on line 359

I have deactivated *all* plugins, then reactivated in this order:
1) Woocommerce
[all okay]

2) Wommerce Multilingual
[all okay]

3) WPML Multilingual CMS
[all okay]

4) WPML Translation Management
[all okay]

5) WPML String Translation
[all okay]

6) WPML Media
…and we have an error: The server encountered an internal error or misconfiguration and was unable to complete your request.

Debug log: [23-Apr-2019 14:01:27 UTC] PHP Fatal error: Maximum execution time of 60 seconds exceeded in /var/www/vhosts/canyonstore.eu/httpdocs/belgium/wp-includes/class-wp-hook.php on line 288

Hello @danielbuvens
Thank you for the information.

I was wondering – where that timeout error occurs?
Is it when you visit a product or only when you activate the media plugin?

Could you please check if this SQL query produces some results for you:

SELECT * FROM wp_postmeta
WHERE meta_key = '_thumbnail_id' AND meta_value = '0';

*Do note that you have to replace wp_ with your database prefix that you have defined in your wp-config.php

**Please make a database backup before doing that

and try and remove the values and see if this helps – but only after database backup please!