Antminer L3++ Firmware install error

Hi, I have tried upgrade my asic with hiveon firmware, file does not upload and I lost connection with asic, an error with login, untill restart asic nothing happens and upgrade does not realize, I’m doing by web interface, somebody knows different ways to flash my asic? It’s possible by sdcard?
After not signed error I got RUNME error…

I just installed the firmware on a new control board for an L3+. It will not connect, says the fee pool is not alive. Now I can’t remove the firmware to try to reinstall it. It would be nice to have known the ssh was also disabled as well as reimplementing the signature not found.

I thought in situations like this, you’re supposed to use the SD card installation method.