VK api keyboard?

Question

PHP

https://pastebin.com/DfRn1Dei

{"one_time":false,"buttons":}

Here buttons(json_encode)
Keyboard format is invalid: button [0][0][action][hash] aid is required
Please tell me why such an error

Answer 1

The error occurs because the string (hash) is missing the parameter aid (application identifier), which is required.
https://vk.com/dev/bots_docs_3