Huawei MediaPad T5 (AGS2-L09) stuck at TWRP

I unlocked bootloader on Huawei MediaPad T5 (AGS2-L09). Then I put TWRP on it and everything was fine until I installed UPDATE-SuperSU-v2.46.zip using TWRP. After that the tablet stuck at Huawei welcome screen. Then I found UPDATE-unSU.zip on xda-developers forum. Its author promised that it will revert changes of UPDATE-SuperSU. Now the tablet goes scrictly into TWRP and doesn't want to do anything else. How to recover it? P.S. Before to install SuperSU-v2.46.zip for the first time I noticed that many folder names in the tablet internal storage were encrypted.