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This thread is resolved. Here is a description of the problem and solution.

Problem:
Un bug has been introduced in WPForms Multilingual 0.3.4 that conflits with WPForms Lite
PHP error "Uncaught Error: Class 'WPForms_Conditional_Logic_Fields' not found in /var/www/www.2lift.com/development/wp-content/plugins/wpml-wpforms/classes/Hooks/WpForms/Notifications.php:24"

Solution:
Update to WPForms Multilingual 0.3.5

Relevant Documentation:
https://wpml.org/download/wpforms-multilingual/?section=changelog

This is the technical support forum for WPML - the multilingual WordPress plugin.

Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.

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This topic contains 3 replies, has 2 voices.

Last updated by mikeH-38 1 year, 6 months ago.

Assisted by: Nicolas V..

Author Posts
June 20, 2023 at 3:03 pm #13861423

mikeH-38

Hello support.

I've gotten this problem and I have deactivated WPML WP Forms to solve it - otherwise the page only gets the message Error500...:

2023-06-20 16:13:35.206318 [NOTICE] [1314180] [T0] [185.25.142.131:51959:HTTP2-1#APVH_www.development.2lift.com:443] [STDERR] PHP Fatal error: Uncaught Error: Class 'WPForms_Conditional_Logic_Fields' not found in /var/www/www.2lift.com/development/wp-content/plugins/wpml-wpforms/classes/Hooks/WpForms/Notifications.php:24
Stack trace:
#0 /var/www/www.2lift.com/development/wp-content/plugins/wpml-wpforms/classes/Loader/WpForms.php(50): WPML\Forms\Hooks\WpForms\Notifications->addHooks()
#1 /var/www/www.2lift.com/development/wp-content/plugins/wpml-wpforms/vendor/wpml/forms/classes/Loader/Base.php(29): WPML\Forms\Loader\WpForms->addHooks()
#2 /var/www/www.2lift.com/development/wp-content/plugins/wpml-wpforms/vendor/wpml/forms/classes/Forms.php(93): WPML\Forms\Loader\Base->load()
#3 /var/www/www.2lift.com/development/wp-includes/class-wp-hook.php(308): WPML\Forms->init('')
#4 /var/www/www.2lift.com/development/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)
#5 /var/www/www.2lift.com/development/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#6 /var/www/www.2lift.com/development/wp-settings.php(623): do_action('init')
#7 /v in /var/www/www.2lift.com/development/wp-content/plugins/wpml-wpforms/classes/Hooks/WpForms/Notifications.php on line 24

Any idea what I should do? Ive talked with my webhost and they haven't made any changed on the server.

I'm looking forward hearing from you.

Best regards
Kristen

June 20, 2023 at 3:24 pm #13861459

mikeH-38

I've just updated the WPML plugins but that doesn't change anything.
When I activate WPML WPFORMS that site breaks down.

Best regards
Kristen

June 20, 2023 at 5:33 pm #13862401

Nicolas V.
Supporter

Languages: English (English ) French (Français )

Timezone: America/Lima (GMT-05:00)

Hello,

Welcome to the WPML support forum. This morning we released WPForms Multilingual v0.3.5 with a hot fox for that issue.

Could you please download this new version and let me know if it fixes the issue for you?
https://wpml.org/download/wpforms-multilingual/?section=changelog