Hello  My remote is flashing a red and green indicator light and I am getting a no image transmission signal on the app and the drone indicator light is flashing red.  I amalso getting an imu calibration required after thying the lastest update .  All of these issues started after the update.  I need help please

The update probably failed.  Try again, then relink.

Hi, we're sorry to know about the situation. I would like to clarify if the firmware update was successful?  May we know what is the model of your mobile device? Would it be possible if you could provide us with the screenshot of the current firmware version of your unit using the DJI GO 4 specifically under the "About" section? Regarding the IMU calibration, you may re-calibrate the IMU to see if there will be changes. Please keep us posted for further assistance.