Did you tried to pair again the remote and drone using the steps you can find on youtube?
Did your remote updated also the firmware as the drone did?
If you did tried all and is not working, as a last resort you can try this:
Downgrade the firmware from drone back to original one if remote was not updated. Install FW via SD Card. Make sure you do not cut power before all is ending, around 40 minutes, because you will do it in "blind" mode, cannot see the progress.
Re-pair the drone and remote, being the same FW now should work.
Update this time with the remote paired to drone, via SD Card....but first, see in remote what FW you have and if it was not updated, because if the RC WAS updated and you downgrade the drone, you will get also issues.