2M flash - use fmuv3 firmware error and it won't work.

After assembling the Fixhawk S500, I completed all the setup-accelerometer settings, calibration, etc. through the mission plane program, but when I try to solve disarmd, I only get a message like 2M flash - use fmuv3 firmware and it won’t work. I tried it because I think I need to update to fmuv3, but the update says no response form board and it doesn’t work. How do I solve it?

Download the .apj file from here and use Mission Planners “load custom firmware”to flash it