Y7 Primei Imei repair fail

[toodledo]

06-Mar-20 3:27:27 PM
HCU Client v1.0.0.0353

Model: DUB-LX1
IMEI: 863385042483926
Firmware ver.: sdm450_DUB-LX1 8.2.0.134(C316)_DATA_DUB-L01_vodacom_za
Dataver: DUB-LX1 8.2.0.134(C316)_DATA_DUB-L01_vodacom_za
SN: DYN6R19B06002590
PCB SN: 6R5PGV19B8011507

Before detection connect cable to usb and enable Manufacture mode !

Qualcomm and HiSilicon: *#*#2846579#*#*
MTK: *#*#14789632#*#*
Windows: ##2846579#

ProjectMenu
1.Background setting
2.USB ports setting
Select Manufacture mode

Repair
Fixed IMEI 1 CRC: 863385042596693

2020-03-06 15:27:27.255 Autodetect COM port and phone type start!
2020-03-06 15:27:28.293 Found COM port: COM7
2020-03-06 15:27:28.295 Found phone type: Huawei Android phone (Qualcomm CPU)
New IMEI 1 : 863385042596693
2020-03-06 15:27:28.423 Open COM port COM7 (DBAdapter Reserved Interface (COM7))...
2020-03-06 15:27:28.544 Connecting to server...
2020-03-06 15:27:29.039 Connected!
2020-03-06 15:27:32.336 ERROR!
Cannot decrypt RSA data from phone

Memo log saved to C:\Users\XYZ\Downloads\HCU_348\Logs\20200306_15273 2_HCU_RepairUmts_456789012345678.txt

What is the solution to this problem?

[Namelocked]

Won't work due to firmware/sec patch