mi mix 3 trying to unlock account give this error?

HI team while unlocking mi account give this error

Code:

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Welcome to Octoplus FRP Tool v.1.7.8.4
Platform: XIAOMI
Selected model: MI MAX 3
Please, select one of the options for "Reset Mi Account" operation or press Ok to continue...
Go to "Wi-Fi Settings" and forget connected Wi-Fi network or perform Wipe Data from recovery
Put the phone into EDL mode:
1. Attach testpoint as shown in Help manual;
2. Connect USB cable;
3. Release testpoint after 3-5 seconds.
Found phone on COM72
Mode: Qualcomm 9008
Connecting...
Reading info...
QC HW ID: 0008B0E100720000
QC CPU: Snapdragon 845 SDM845
QC SW VER: 00000002
Searching loader...
Sending loaders...
Could not write loader!
Backup saved as XIAOMI_MI MAX 3_14-09-2019_12-49-32.dump file
Performed by 1.7.8.4 Software version.

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