Sklok Try to boot into it immediately after the TVRP firmware, make it not the system size (as suggested in the first menu dialog), flash supersu version 2.76 - 2.78 (preferably the last), and then reboot. supersu when installing the boot partition, it can help. I personally have a Doogee T3 and if I put it on a freshly installed firmware TVRP, then the same situation happens, suoersu helps, as I described above