how to unbrick OP3T in Ubuntu 20.04

is there anyone that can advise me how to reinstall the OTA in my OP3T where there is nothing install. TWRP says when I try to wipe all , that is unable to mount it. Now I have not system at all, and I am trying to reinstall the OTA from OnePlus. How can I introduce the OTA in twrp so I can install it againa?