Is Rest API enabled for your account? As a test, can you try to create a meeting with a tool like Postman? This will help isolate the issue. In the meantime, you can also take a look at this post with a similar issue :
Is Rest API enabled for your account? As a test, can you try to create a meeting with a tool like Postman? This will help isolate the issue. In the meantime, you can also take a look at this post with a similar issue :