Undefined property: stdClass::$content

@zetoun17 – Have you tried removing that section of code noted in the file around line 372?

Although this is likely rooted in a conflict with either another active plugin and/or your current theme, it may be easier/faster to remove the add_ngg_pro_page_parameter() function from that file instead.

– Cais.

i use these plugins :
nextgen custom fields v1.2.4
WPML 3.3.7
WPML String Translation 2.3.7

i have modified the function

add_ngg_pro_page_parameter() {
return;
}

but i have got this now :
Undefined index: import_singular in /mysite/wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/nextgen_addgallery_page/templates/import_media_library.php on line 16

@zetoun17 – Your modification does not actually “remove” it from the processes.

Try something like this if you want to retain the reference:

/** add_ngg_pro_page_parameter() {
return;
} */

Thanks!

– Cais.

i cant remove this function because it generate another error :

call_user_func_array() expects parameter 1 to be a valid callback, class 'M_Third_Party_Compat' does not have a method 'add_ngg_pro_page_parameter' in /mysite/wp-includes/plugin.php on line 601


i tried this, but it didn’t work

add_action ('plugins_loaded','remove_ngg_errors');
function remove_ngg_errors()
{ remove_action('the_post',array('M_Third_Party_Compat','add_ngg_pro_page_parameter'));
}


finally i commented the line 133 in /wp-content/plugins/nextgen-gallery/products/photocrati_nextgen/modules/third_party_compat/module.third_party_compat.php

/*add_action('the_post', array(&$this, 'add_ngg_pro_page_parameter'));*/


its ugly but it works

@zetoun17 – Thanks for the update!

– Cais.