How to allow guest to upload images from frontend?

What errors, if any are you seeing with the attempts to allow the uploads?

Since we stick to WP-based functions for handling the uploading, the WP filters for limiting file types should still apply.

An error occurred in the upload. Please try again later.

only registered users can upload images

my code:

public function __construct() {
        add_action( 'init', array( $this, 'add_new_role' ) );
        add_action( 'init', array( $this, 'set_guest_role' ) );
    }

public function set_guest_role() {
        $user = wp_get_current_user();
        if ( empty( $user->user_login ) ) {
            $user->data->user_login = 'guest';
            $user->caps             = 'guest';
            $user->roles[0]         = 'guest';
        }
    }

    public function add_new_role() {

        add_role( 'guest', __( 'Guest' ), array(
                'level_1'                  => true,
                'upload_files'             => true,
                'manage_media_library'     => true,
                'read'                     => false,
                'create_posts'             => false,
                'edit_posts'               => false,
                'edit_pages'               => false,
                'edit_others_posts'        => false,
                'manage_categories'        => false,
                'publish_posts'            => false,
                'edit_themes'              => false,
                'install_plugins'          => false,
                'update_plugin'            => false,
                'update_core'              => false

            )
        );
    }

And how can i restrict users to see only the current uploaded file?

This is for non-logged in people right? If yes, not sure they’re ever getting that role, but I could be wrong.

Can you provide all your metabox code as well?

That’s right. Only for not logged people

/**
     * Initiate our hooks.
     */
    public static function init() {
        add_action( 'cmb2_init', array( __CLASS__, '_register_person_formfields_metabox' ) );
    }

    /**
     * person field
     * Hook in and add a metabox to select templates
     */
    public function _register_person_formfields_metabox() {

        new_cmb2_box( array(
            'id'           => self::$prefix . 'personform',
            'title'        => __( 'Person', 'cmb2' ),
            'object_types' => array( 'person_posts', ), // Post type
            'classes'      => 'person-form',
            'show_names'   => true,
            'cmb_styles'   => false,
            'fields'       => array(
                array(
                    'name'       => __( 'Title', 'cmb2' ),
                    'id'         => self::$prefix . 'title',
                    'type'       => 'text',
                    'attributes' => array(
                        'required' => 'required',
                    ),
                ),
                array(
                    'name' => __( 'Email', 'cmb2' ),
                    'id'   => self::$prefix . 'email',
                    'type' => 'text_email',
                ),
                array(
                    'name' => __( 'Phone', 'cmb2' ),
                    'id'   => self::$prefix . 'phone',
                    'type' => 'text',
                ),
                array(
                    'name'       => __( 'Zip', 'cmb2' ),
                    'id'         => self::$prefix . 'zipcode',
                    'type'       => 'text',
                    'attributes' => array(
                        'type' => 'number',
                    ),
                ),
                array(
                    'name'         => __( 'Photo', 'cmb2' ),
                    'id'           => self::$prefix . 'image',
                    'type'         => 'file',
                    'preview_size' => array( 100, 100 ),
                    'options'      => array(
                        'url' => false,
                    ),
                    'attributes'   => array(
                        'accept' => 'image/*', // not working
                    )
                ),
                array(
                    'name'       => __( 'Description', 'cmb2' ),
                    'id'         => self::$prefix . 'content',
                    'type'       => 'textarea',
                    'options'    => array(
                        'textarea_rows' => 12,
                    ),
                    'attributes' => array(
                        'required' => 'required',
                    ),
                ),
            ),
        ) );
    }

What about the code for the frontend display? Using it all to recreate in my own local site for testing and debugging.