Can you download [link|https://www.dji.com/downloads/softwares/assistant-dji-2-for-mavic|DJI Assistant 2 for Mavic|new_window=true] and try and update the drone and controller firmware using [link|https://www.windowscentral.com/how-update-your-dji-drones-firmware-your-pc#:~:text=How%20to%20Update%20My%20DJI%20Drone%20Firmware%201,firmware%20update%20from%20the%20left-hand%20menu.%20See%20More.|this guide|new_window=true]? You must do it on a computer running Windows or MacOS Mojave or earlier.