fastboot: error: Failed to identify current slot when tring to flash

Cant get to isntall eOS on my Oneplus 6 fastboot_ error_ failed to identify current slot i've tried to fix it with the rescue and smart assistant but it keeps failing, i also tried flashing it with fastboot but i get the message fastboot set active slot Using fastboot flash boot from the host PC fails too, with a similar error: error: Failed to identify current slot Diffing the

fastboot change slot To enter fastbootd mode, bootloader writes boot-fastboot into the command field of the BCB message and leaves the recovery field of BCB unchanged (to enable