[Resolved] Error 500 accessing Translation Management in CMS

I’ve tried troubleshooting steps but none of them worked so far, I’m going to escalate this issue to our 2nd tier support for further review.

Thank you for your cooperation

Our 2nd tier support said, this issue is caused by the Visual Composer PRO plugin registering a custom post type (vcv_headers) without proper labels, which conflicts with WPML.

This isn’t a bug in WPML, but we’ve added a workaround on our side to avoid the error. There are two possible Workaround and you can follow any of them:

=== Please backup your database and website first for safety reasons ===

Workaround 1 (recommended):
Add the following code to your theme’s functions.php file:

add_filter( 'wpml_post_type_dto_filter', function ( $postTypeObject ) {
	if ( is_object( $postTypeObject ) ) {
		$default = $postTypeObject->name ?? '';
		if ( ! isset( $postTypeObject->labels ) || ! is_object( $postTypeObject->labels ) ) {
			$postTypeObject->labels = new stdClass();
		}
		if ( empty( $postTypeObject->name ) ) {
			$postTypeObject->name = $default;
		}
		if ( empty( $postTypeObject->labels->name ) ) {
			$postTypeObject->labels->name = $default;
		}
		if ( empty( $postTypeObject->labels->singular_name ) ) {
			$postTypeObject->labels->singular_name = $default;
		}
	}
	return $postTypeObject;
} );

Workaround 2:
You can also manually edit the plugin file:
/wp-content/uploads/visualcomposer-assets/addons/themeEditor/themeEditor/PostTypeController.php

Replace below code:

protected function registerPostType()
    {
        register_post_type(

With:

protected function registerPostType()
{
	if (!isset($this->postNamePlural)){
		$this->postNamePlural = $this->postNameSlug;
	}
	register_post_type(

However, this change can be lost if the plugin updates.

We also recommend reporting this to the Visual Composer PRO team so they can fix it in their code.

Kindly let me know the results,
Thank you