[Closed] migrate from polylang to WPML class-mpw_migrate_posts.php on line 89

Hi Gabor,

Thank you for contacting WPML support, I'd be happy to help you with this issue.

I've requested access to the backup file in the Google Drive link. Please approve the request then I can download the backup file.
I also deleted the part from the path in the first message.

Look forward to your reply.
Thanks

Hi,

Thank you for your feedback.

I download the backup file, run the migration on my demo site and see the issue happens when using PHP 8.1. If I downgrade PHP to 7.4 and the migration process will work properly.

I'm asking my 2nd tier support about this issue and update you here when I have something to share.

Thanks.

Hi,

Thank you for your feedback.

I got a workaround to fix this issue when using PHP 8.1, please make sure you have applied the workaround as my colleague suggested here https://wpml.org/forums/topic/problem-with-migrate-from-polylang/#post-12255319

Then around line 24, right before the line

list($trid, $post_type) = $this->set_original_post_language_details($relation, $default_language_code);

add this code

if( !is_array( $relation ) ) {
    continue;
}

and around line 94 replace the code

$original_post_id = isset($relation['sync']) ? $relation['sync'][$default_language_code['polylang']] : $relation[$default_language_code['polylang']];

with this one

$original_post_id = (isset($relation['sync']) ? $relation['sync'][$default_language_code['polylang']] : isset($relation[$default_language_code['polylang']])) ? $relation[$default_language_code['polylang']] : reset($relation);

❌ IMPORTANT: Please backup your database and website before proceeding ❌

Look forward to your reply.
Thanks