For MI5X users with black screen
Flash this fastboot image http ://big o ta.d.miui.com/8.11.15/tiffany_images_8.11.15_20181116.0000.00_8.1_cn_6ea7e322a8.tgz (delete the spaces) and try MIUI EU again, using the TWRP 3.2.3. I had the black screen bug, but after flash this fastboot image it was solved