Why do I get 'invalid parameters' error when I launch the live class?

The error says that you have missed some of the parameters in the launch URL or there is an error. See developer API documentation and make sure you have all the request parameters specified correctly for the "Get Class Launch URL" call.

This error also occurs if there is an empty space in the URL, and so it added %20 for that empty space character. You would need to remove %20 from the URL.

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