@scottybo Invalid additional_owners Arguments. It must be a comma separated list of userIds. provided:

[maharajay]

Invalid additional_owners Arguments. It must be a comma separated list of userIds. provided:

[vyasishanatc194]

@maharajay
Please do as below for solve error.

$init_media = Twitter::uploadMedia([
    'command' => 'INIT',
    'media_type' => 'video/mp4',
    'media_category' => 'tweet_video',
    'total_bytes' => $file_size,
    'additional_owners' => null /* remove this line, This error will be gone*/
]);