How to save grouped data?

I am doing a custom import of CPT by using the PHP API.

One CTP has a group field, I wonder how to save the serialized value in the meta data.

I have tried it like this:

$meta_value = serialize([
                                    [
                                        'active' => 1,
                                        'release_date' => $driverData['date'],
                                        'version' =>; $driverData['version'],
                                        'download_count' => $driverData['counter'],
                                        'file' => [$driverFileAttachmentId],
                                        'os_compat' => $osCompat //is array
                                    ]
                                ]);
                                add_post_meta($found_post->ID, 'treiber_group', $meta_value);

The meta box is added like this: https://ghostbin.com/paste/eg26u

When I try to open the CPT I see:
Warning: Invalid argument supplied for foreach() in /home/user/public_html/modules/meta-box-aio/extensions/meta-box-group/class-rwmb-group-field.php on line 228

Warning: Invalid argument supplied for foreach() in /home/user/public_html/modules/meta-box/inc/clone.php on line 28