This error means Cryptohopper received a webhook from TradingView, but the message body was invalid. TradingView successfully sent the alert, but the content wasn't recognized as a valid Cryptohopper instruction. There are two common causes.
Cause 1 — The alert is in the wrong field
The alert content was placed in the Alert name field instead of the Message field.
Solution
Go to TradingView and open the alert you want to edit, or create a new one.
In Cryptohopper, generate the correct alert message for your bot.
In the TradingView alert dialog, locate the Message field (not the Alert name).
Paste the generated message into the Message field.
Click Save to update the alert.
Cause 2 — A capital letter in the alert message
The alert message contains a capital letter where it shouldn't. In the example below, the word "Action" is written with a capital letter — it should be "action". Only the name of the coin can be written in capital letters.
Solution
Always copy and paste the alert message you generate in Cryptohopper, and only make the adjustments that are allowed. Every parameter (such as action and market_order) must be lowercase — only the coin (e.g. BTC) may use capital letters.
Verify the fix
After saving, trigger the alert from TradingView. If set up correctly, the "406 Not Acceptable" error will no longer appear in your Cryptohopper notifications.