Sorry for the inconvenience. I would recommend you to contact our support team and start up a case: (https://www.dji.com/support?site=brandsite&from=nav). You can provide your case number here in case you need further assistance. Thanks for your support.
Hi, if the 5D button on your remote controller is missing, I would recommend contacting our team like DJI Paladin mentioned for further help. Thank you.