I get the same thing…
[INFO] Make connection: ‘LimeSDR-USB [USB 3.0] 9072C00D5071E’
[INFO] Reference clock 30.72 MHz
[INFO] Device name: LimeSDR-USB
[INFO] Reference: 30.72 MHz
[INFO] LMS7002M register cache: Disabled
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 5 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
[INFO] Filter calibrated. Filter order-4th, filter bandwidth set to 11.563 MHz.Real pole 1st order filter set to 2.5 MHz. Preemphasis filter not active
[INFO] TX LPF configured
[ERROR] Tx Calibration: MCU error 3 (SXR tune failed)