Note: The error code is the last 3 digits of the code you see in the error notification. For example, if you see the error notification Call failed (code: 2202404), the error code is 404.
If you are receiving Zoom Phone error 403: Your call can not be completed yet. Please try again later., this means that there might be a problem with your account license or calling plan.
Contact your Zoom Phone admin for help. The admin may need to assign a Zoom Phone license or calling plan.