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Problem:
If you're experiencing issues with adding products to the cart on a multilingual WooCommerce site, where Bulgarian is the main language and English is secondary, this might be due to a compatibility issue with the Buy Once or Subscribe for WooCommerce Subscriptions plugin.
Solution:
We recommend following these steps to resolve the issue:
1. Navigate to WPML > Settings > Custom Fields Translation and click on "Show system fields".
2. Search for "_bos4w_saved_variation_subs" and set it to Copy. Save your changes.
3. Search for "bos4w_use_variation_fixed_price_" and change all results to Copy. Save your changes.
4. Replace the code in

content/plugins/buy-once-or-subscribe-for-woocommerce-subscriptions/functions/class-bos4w-front-end.php

with the updated code from the provided link.
5. Do the same for

class-bos4w-cart-options.php

.
6. Make a minor edit to the original product experiencing the issue to apply the solution.
7. Update its translation.
Additionally, you can translate the plugin strings in WPML > String Translation under the domain "bos4w".
For the files with the updated code, please visit: https://we.tl/t-HmLg3HiCkZ

If this solution does not apply to your case, or if it becomes outdated, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If issues persist, please open a new support ticket at our support forum.

Problem:
If you're experiencing an issue where your translated page is not found on the frontend, it might be due to the Events Manager plugin handling the

publish_future_post

action incorrectly. This occurs when the event's title (

post_title

) is empty, causing the system to generate a blank slug and fail.
Solution:
We recommend contacting the plugin developers at https://wp-events-plugin.com to review and address this issue. As a temporary workaround, you can comment out the problematic action in the plugin's code by modifying

/wp-content/plugins/events-manager/classes/em-event-post.php

as follows:

add_action('publish_future_post', array('EM_Event_Post', 'publish_future_post'), 10, 1);

Alternatively, adjust the code to:

$is_post_type = Archetypes::is_repeating( $post_type ) ? Archetypes::get_repeating_archetype( $post_type ) : NULL;

This change helps prevent assigning an invalid post type when the event lacks a title.

If this solution does not resolve your issue or seems irrelevant due to being outdated or not applicable to your case, we highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. If the problem persists, please open a new support ticket with us for further assistance.