Error after latest update?

hi, im having the same issue when trying to edit a loop I made a few days ago. I am sure this has to be with the plugin because I have no issues editing any other page, template or section made with Elementor. Only what I did with Ele Custom Skin.
Below a summary of the Elementor Info:

					
== Server Environment ==
	Operating System: Linux
	Software: LiteSpeed
	MySQL version: MariaDB Server v10.3.27
	PHP Version: 7.4.13
	PHP Max Input Vars: 1000
	PHP Max Post Size: 8M
	Elementor Library: Connected

== WordPress Environment ==
	Version: 5.4.2

== Theme ==
	Name: Hello Elementor
	Version: 2.3.1
	Author: Elementor Team
	Child Theme: No

== Active Plugins ==
	Ele Custom Skin
		Version: 3.0.0
		Author: Dudaster.com

	Elementor
		Version: 3.0.15
		Author: Elementor.com

	Elementor Pro
		Version: 3.0.9
		Author: Elementor.com

	

== Log ==
	
Log: showing 12 of 122020-12-29 10:32:48 [info] Elementor data updater process has been queued. [array (
  'plugin' => 'Elementor',
  'from' => '2.9.14',
  'to' => '3.0.15',
)]
2020-12-29 10:32:49 [info] elementor::elementor_updater Started 
2020-12-29 10:32:49 [info] Elementor/Upgrades - _v_3_0_0_move_general_settings_to_kit Start  
2020-12-29 10:32:49 [info] Elementor/Upgrades - _v_3_0_0_move_general_settings_to_kit Finished 
2020-12-29 10:32:49 [info] Elementor/Upgrades - _v_3_0_0_move_default_colors_to_kit Start  
2020-12-29 10:32:49 [info] Elementor/Upgrades - _v_3_0_0_move_default_colors_to_kit Finished 
2020-12-29 10:32:49 [info] Elementor/Upgrades - _v_3_0_0_move_saved_colors_to_kit Start  
2020-12-29 10:32:49 [info] Elementor/Upgrades - _v_3_0_0_move_saved_colors_to_kit Finished 
2020-12-29 10:32:49 [info] Elementor/Upgrades - _v_3_0_0_move_default_typography_to_kit Start  
2020-12-29 10:32:49 [info] Elementor/Upgrades - _v_3_0_0_move_default_typography_to_kit Finished 
2020-12-29 10:32:49 [info] Elementor data updater process has been completed. [array (
  'plugin' => 'Elementor',
  'from' => '2.9.14',
  'to' => '3.0.15',
)]
2020-12-29 12:21:15 [info] Elementor data updater process has been completed. [array (
  'plugin' => 'Elementor Pro',
  'from' => '3.0.8',
  'to' => '3.0.9',
)]

PHP: showing 7 of 7PHP: 2020-12-29 10:37:38 [notice X 34][/home/nnm/public_html/wp-content/plugins/elementor/core/common/modules/ajax/module.php::171] Undefined index: data [array (
  'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2020-12-29 11:19:08 [notice X 14][/home/nnm/public_html/wp-content/plugins/elementor/includes/managers/image.php::86] Trying to access array offset on value of type bool [array (
  'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2020-12-29 11:31:57 [notice X 1][/home/nnm/public_html/wp-content/plugins/elementor-pro/modules/query-control/module.php::738] Trying to get property 'name' of non-object [array (
  'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2020-12-29 18:18:38 [notice X 3][/home/nnm/public_html/wp-content/plugins/elementor-pro/modules/posts/widgets/posts.php::31] Undefined index: posts_post_type [array (
  'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2020-12-29 23:02:20 [error X 3][/home/nnm/public_html/wp-content/plugins/elementor-pro/modules/theme-builder/classes/conditions-manager.php::281] Uncaught Error: Call to a member function update_meta() on bool in /home/nnm/public_html/wp-content/plugins/elementor-pro/modules/theme-builder/classes/conditions-manager.php:281
Stack trace:
#0 /home/nnm/public_html/wp-content/plugins/elementor-pro/modules/theme-builder/classes/conditions-manager.php(162): ElementorPro\Modules\ThemeBuilder\Classes\Conditions_Manager->save_conditions(NULL, Array)
#1 [internal function]: ElementorPro\Modules\ThemeBuilder\Classes\Conditions_Manager->ajax_save_theme_template_conditions(Array, Object(Elementor\Core\Common\Modules\Ajax\Module))
#2 /home/nnm/public_html/wp-content/plugins/elementor/core/common/modules/ajax/module.php(171): call_user_func(Array, Array, Object(Elementor\Core\Common\Modules\Ajax\Module))
#3 /home/nnm/public_html/wp-includes/class-wp-hook.php(287): Elementor\Core\Common\Modules\Ajax\Module->handle_ajax_request('')
#4 /home/nnm/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters('', Array)
#5 /home/nnm/public_html/wp-includes/plugin.p [array (
  'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2020-12-30 11:11:50 [notice X 15][/home/nnm/public_html/wp-content/plugins/elementor/includes/controls/groups/image-size.php::110] Trying to access array offset on value of type null [array (
  'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]
PHP: 2020-12-31 20:47:18 [notice X 28][/home/nnm/public_html/wp-content/plugins/elementor-pro/modules/posts/skins/skin-content-base.php::248] Trying to get property 'ID' of non-object [array (
  'trace' => '
#0: Elementor\Core\Logger\Manager -> shutdown()
',
)]

JS: showing 3 of 3JS: 2020-12-29 21:14:25 [error X 1][https://nnm.cl/wp-content/plugins/elementor/assets/lib/backbone/backbone.marionette.min.js?ver=2.4.5.e1:24:19952] View (cid: \"view19920\") has already been destroyed and cannot be used. 
JS: 2020-12-29 21:18:48 [error X 2][https://nnm.cl/wp-content/plugins/elementor/assets/js/editor.min.js?ver=3.0.15:2:474760] elementorFrontend.elements.window.jQuery is not a function 
JS: 2020-12-30 14:11:48 [error X 8][https://nnm.cl/wp-content/plugins/elementor/assets/js/editor-modules.min.js?ver=3.0.15:2:54754] An invalid argument supplied as multiple control value [array (
  'category' => 'InvalidElementData',
  'tag' => 'Element <code>undefined</code> got as <code>menu_link</code> value. Expected array or object.',
)]
				

Please let me know if you need anything else to track the issue.
Thanks in advance!

If you upgrade Elementor 2.x to Elementor 3.x you have this issue.

What you have to do?

Try activate ECS again after Elementor update.