I'm experiencing the same thingHow do I install through TWRP? When formatting data, it does not show me any files and I cannot flash.
EDIT: I was able to install the ROM, but then it rebooted into TWRP recovery mode and had no files. I had to reinstall the Fastboot version of MIUI. Could you explain to me what TWRP you used and what exactly did you do to install ONE OS? For example, what things did wipe do, what version of twrp did they use, etc.