Why error 100 in vk bot?

Question

In contact with

Hello! There is a code, the bot should, in theory, mark messages as read:

$vk->request('messages.markAsRead', ['message_ids' => $msg_id, 'peer_id' => $peer_id]);

But for some reason I get errors:
[Exception]: an error occurred:
[Exception]: text: {"error":{"error_code":100,"error_msg":"One of the parameters specified was missing or invalid: message is empty or invalid","request_params":[{"key":"method","value":"messages.send"},{"key":"oauth","value":"1"},{"key ":"peer_id","value":"476598060"},{"key":"v","value":"5.103"},{"key":"random_id","value":"1344668602"} ]}}
[Exception]: error code: 100
[Exception]: file: /home/blah/blah/blah/public_html/test/simplevk-master/src/vk_api.php:223
[Exception]: error path:#0 /home/blah/blah/blah/public_html/test/simplevk-master/src/vk_api.php(392): DigitalStar\vk_api\vk_api->request('messages.send', Array)
#1 /home/blah/blah/blah/public_html/test/bot.php(98): DigitalStar\vk_api\vk_api->sendMessage('476598060', '')
#2 {main}
I even tried this:

$vk->request('messages.markAsRead', ['message_ids' => $msg_id, 'peer_id' => 'ID группы']);

Tell me why the bot does not want to mark messages as read and swears. API version 5.103

Answer 1

The error is not in messages.markAsRead, but in sendMessage('476598060', ''). Message is empty

Answer 2

Well, the error says - the message is empty