Redmi Note 7 problem

I connected test point and try remove frp but have error.

Chimera Mobile Phone Utility version: 21.56.1219 @ 2019-07-01
Delete FRP partition
Preparing Qualcomm programmer
Gathering device info
Downloading Qualcomm programmer
Connecting to Qualcomm programmer
failed to send sig
Failed to prepare Qualcomm programmer
Finished at local time: [07.01.19 14:01:06]
WorkID: 64541632