hello guys, can you help me with this error:

oneplus 3T lineageOS 17.1 androd 10 with nethunter 2020.2 Oneplus3 Any Ten


and


oneplus 3T Oxygen 9.02 pie with with nethunter 2020.2 Oneplus3 Any Pie


in twrp both gives the same error when installing it


"TWRP error mount system con rw!"
hello can you help me with this