When we encrypt the state param with fed ramp compliant algorithms we receive 502 bad-gateway. We send UGC/PII data in state param.
Run this URL on browser and check the response
https://zoom.us/oauth/authorize?client_id=JAGqErBBQjC7Ng7LOXMX4g&response_type=code&redirect_uri=https%3A%2F%2Fzoom.us&state=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