I flashed into the First my SGP771 with Custom_DE_32.3.A.2.33 Firmware
with the Flashtool, no Problem. It run´s, no Problem. All OK.
Then i flash the TWRP-Recovery "3.1.0.0" in "fastboot mode" with the Code :
fastboot flash recovery twrp.img
No Problem, all OK.
Then i pressed Power + VOL- and...