did you follow all 3 commands ?
sudo piaware-config uat-receiver-type sdr
sudo piaware-config rtlsdr-device-index 00001090
sudo piaware-config uat-sdr-device driver=rtlsdr,serial=00000978
Also see [Package Install] How to Install and Configure Piaware on Raspberry Pi OS Image / RPi point 6 if you are not using a SD image