I used instructions in the How to Install TWRP for OnePlus 8, flashing TWRP.img to recovery_a and recovery_b. It worked once and was able to create one backup. But now the phone goes to a different screen when I open recovery mode, I guess what some people are calling CrashDump, where it asks the language, then Wipe or Advanced options…It boots normally to Android OOS11.
Do I need to flash the TWRP.img file again in fastboot with ADB, then reboot and install the TWRP zip file from my computer? Can you send instructions for the last part?