[BUG] MB CPT edit shows blank page

Hi Long,

WP_DEBUG is true and shows no errors.

Here is a video of the problem :
https://video.boostemaboite.fr/conversations/3b9c261a-0f2f-5748-86a2-a7668965edf7

Here is the code for one of the CPTs, nothing special :

<?php
add_action( 'init', 'your_prefix_register_post_type' );
function your_prefix_register_post_type() {
    $labels = [
        'name'                     => esc_html__( 'Activités', 'your-textdomain' ),
        'singular_name'            => esc_html__( 'Activité', 'your-textdomain' ),
        'add_new'                  => esc_html__( 'Ajouter', 'your-textdomain' ),
        'add_new_item'             => esc_html__( 'Ajouter une activité', 'your-textdomain' ),
        'edit_item'                => esc_html__( 'Modifier l'activité', 'your-textdomain' ),
        'new_item'                 => esc_html__( 'Nouvelle activité', 'your-textdomain' ),
        'view_item'                => esc_html__( 'Voir l'activité', 'your-textdomain' ),
        'view_items'               => esc_html__( 'Voir les activités', 'your-textdomain' ),
        'search_items'             => esc_html__( 'Rechercher les activités', 'your-textdomain' ),
        'not_found'                => esc_html__( 'Pas d'activité trouvée', 'your-textdomain' ),
        'not_found_in_trash'       => esc_html__( 'Pas d'activités dans la corbeille', 'your-textdomain' ),
        'parent_item_colon'        => esc_html__( 'Activité parent :', 'your-textdomain' ),
        'all_items'                => esc_html__( 'Toutes les activités', 'your-textdomain' ),
        'archives'                 => esc_html__( 'Archive des Activités', 'your-textdomain' ),
        'attributes'               => esc_html__( 'Attributs d'activité', 'your-textdomain' ),
        'insert_into_item'         => esc_html__( 'Ajouter à l'activité', 'your-textdomain' ),
        'uploaded_to_this_item'    => esc_html__( 'Chargé dans cette activité', 'your-textdomain' ),
        'featured_image'           => esc_html__( 'Image en vedette', 'your-textdomain' ),
        'set_featured_image'       => esc_html__( 'Définir l'image en vedette', 'your-textdomain' ),
        'remove_featured_image'    => esc_html__( 'Supprimer l'image en vedette', 'your-textdomain' ),
        'use_featured_image'       => esc_html__( 'Utiliser comme image en vedette', 'your-textdomain' ),
        'menu_name'                => esc_html__( 'Activités', 'your-textdomain' ),
        'filter_items_list'        => esc_html__( 'Filter activités list', 'your-textdomain' ),
        'filter_by_date'           => esc_html__( '', 'your-textdomain' ),
        'items_list_navigation'    => esc_html__( 'Activités list navigation', 'your-textdomain' ),
        'items_list'               => esc_html__( 'Activités list', 'your-textdomain' ),
        'item_published'           => esc_html__( 'Activité published', 'your-textdomain' ),
        'item_published_privately' => esc_html__( 'Activité published privately', 'your-textdomain' ),
        'item_reverted_to_draft'   => esc_html__( 'Activité reverted to draft', 'your-textdomain' ),
        'item_scheduled'           => esc_html__( 'Activité scheduled', 'your-textdomain' ),
        'item_updated'             => esc_html__( 'Activité updated', 'your-textdomain' ),
        'text_domain'              => esc_html__( 'your-textdomain', 'your-textdomain' ),
    ];
    $args = [
        'label'               => esc_html__( 'Activités', 'your-textdomain' ),
        'labels'              => $labels,
        'description'         => '',
        'public'              => true,
        'hierarchical'        => false,
        'exclude_from_search' => false,
        'publicly_queryable'  => true,
        'show_ui'             => true,
        'show_in_nav_menus'   => true,
        'show_in_admin_bar'   => true,
        'show_in_rest'        => true,
        'icon_type'           => dashicons,
        'icon'                => dashicons-palmtree,
        'query_var'           => true,
        'can_export'          => true,
        'delete_with_user'    => true,
        'has_archive'         => true,
        'rest_base'           => '',
        'show_in_menu'        => true,
        'menu_icon'           => '',
        'menu_position'       => 2,
        'capability_type'     => 'post',
        'supports'            => ['title', 'editor', 'thumbnail'],
        'taxonomies'          => ['type-d-activite'],
        'rewrite'             => [
            'with_front' => false,
        ],
    ];

    register_post_type( 'les-activites', $args );
}

[SOLVED]

I did deactivate all plugins except MB & MB AIO.
Then updated to 1.15.2 => Works fine
Then activated all plugins one by one, checking each time MB => Works fine.

I could not determine what was conflicting.

Thanks for your time.