I have flashed 4.36.10.3406 to over a dozen cams successfully. I just flashed 7 straight out of the box just last month. Some did not take the flash on the first try, or even the second. I attribute that to using the same microSD to flash them all. I’m not sure what files we’re being written to the card from the previous cams that may have prevented the flash. As soon as I reformatted the card and recopied the .bin, the cams took the flash easily.
Make sure you are using a high quality 32GB card that has been freshly formatted FAT32.
If it still fails, get an older FW .bin and try to flash that. I have them all back to 4.36.0.xx if you are having issues finding it. There are links to old firmware in the forum that might still be good.