BUG Oppo K10 5G Send bootloader... error ($8: 8)

[yonglebox]

10:47:11 Selected model: OPPO PGJM10 (Oppo K10 5G)
10:47:11 Operation: Reset Account
10:47:11 Software version: 10.1.68
10:47:11
10:47:11 Connect phone in PRELOADER mode.
10:47:11 Waiting for device... OK
10:47:31 Device found at COM29
10:47:31 Port: USB\VID_22D9&PID_0006\5&DC4A972&0&14
10:47:31 Driver: [MediaTek Inc.,wdm_usb,MediaTek PreLoader USB VCOM_V1633 (Android),usb2ser.sys,3.0.1504.0]
10:47:31 Port type: PRELOADER
10:47:31 Open port... OK
10:47:31 Send start cmd... OK
10:47:32 Get HW code... [1172]
10:47:32 Get HW & SW version from device... OK
10:47:32 HW VER: CA00, SW VER: 0000, HW SUB CODE: 8A00
10:47:32 Detect chip [MT6895]
10:47:32 Library Version [2]
10:47:32 Select platform... OK
10:47:32 Init BROM... OK
10:47:32 Force Charge... OK
10:47:32 Disable WatchDog Timer... OK
10:47:32 Get sec config... [00000005]
10:47:32 Active sec flags: [SBC DAA]
10:47:32 Read MEID... OK
10:47:32 MEID: 83438
10:47:32 Load DownloadAgent... OK
10:47:32 Search DA... OK [0]
10:47:32 DA file: OPPO.da
10:47:32 Send bootloader... error ($8: 8)
10:47:32 Operation failed: Send bootloader failed