API library not found in Server

It seems that you're encountering an issue with accessing the Quantconnect.Data.Custom.CBOE API in your algorithm. Here are some steps and considerations to help you proceed:

1. API Availability: The CBOE class is part of the QuantConnect data source, specifically for CBOE data. This data might not be available for free accounts, as certain datasets require a paid subscription. You should verify if your current subscription level includes access to CBOE data.

2. Subscription Requirements: Check the QuantConnect pricing page or your account settings to see if you need to upgrade your account to access this data. Some datasets, like US Index Options, require specific subscriptions.

3. Custom Data Setup: Ensure that your algorithm is correctly set up to use custom data. This involves using the add_data method to subscribe to the custom data source. Here's a basic example of how to add custom data:

   class CustomDataAlgorithm(QCAlgorithm):
       def initialize(self):
           self.set_start_date(2020, 1, 1)
           self.set_end_date(2021, 1, 1)
           self.set_cash(100000)
           self.add_data(CBOE, "VIX", Resolution.DAILY)
   
       def on_data(self, data):
           if data.contains_key("VIX"):
               vix_data = data["VIX"]
               self.log(f"VIX: {vix_data.close}")
   

4. Error Messages: Review any error messages or logs provided during the compile process. They may give additional clues about the issue, such as missing permissions or incorrect data subscriptions.

5. Alternative Data Sources: If CBOE data is not accessible with your current plan, consider using alternative datasets that are available for free accounts.

6. Contact Support: If the issue persists and you believe you should have access to the data, consider reaching out to QuantConnect support for further assistance.

By following these steps, you should be able to determine the cause of the issue and take appropriate action to resolve it.

Sources: Costs - QuantConnect.com, Requesting Data - QuantConnect.com, Requesting Data - QuantConnect.com, Key Concepts - QuantConnect.com, Futures Fast Trend Following, with Trend Strength