Error while checking VK API code?

Question

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So, here is the error itself when I check the performance of the bot:

{"error":{"error_code":917,"error_msg":"You don't have access to this chat","request_params":[{"key":"v","value":"5.103"} ,{"key":"chat_id","value":"53"},{"key":"group_id","value":"199904779"},{"key":"random_id","value": "515848941"},{"key":"method","value":"messages.send"},{"key":"oauth","value":"1"}]}}

What's wrong? Look at the code and tell me please.
I will leave the bot code below:
https://pastebin.com/KcGb6ySA

Answer 1

I don't have access to chat to send a message