[Amazfit] sunrisekdt:
I've just do that. But nothing change. The issue still there. How can I fix it??

Thanks bro [MENTION=5062938]Saratoga79[/MENTION]

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INFO adb/fastboot
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Android Debug Bridge version 1.0.40
Version 4986621
Installed as C:\Users\User\AppData\Local\Temp\ir_ext_temp_3\AutoPlay\Docs\adb.exe
fastboot version 28.0.1-4986621
Installed as C:\Users\User\AppData\Local\Temp\ir_ext_temp_3\AutoPlay\Docs\fastboot.exe
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CONNECT YOUR WATCH TO BEGIN
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CHECKING IF FULL BOOT IS COMPLETED
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OK! LET'S GO!
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INSTALLATION FEATURES
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Watch = Pace
Key/Button mapping = Power
ROM Language = en-US
Factory Reset = yes
System Fonts = sto
GPS Firmware = Old/Stock 18344
Bluetooth volume boost = yes
Launcher App List = yes
Notifications manager = no
Animations speed = 0.1
Watchface date format = 31-12-2019
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WATCH FEATURES
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HYBRID PACE ROM NOT DETECTED
BATTERY LEVEL: 100
BOOTLOADER STATUS: Unlocked
DETECTED WATCH MODEL: A1612 - Amazfit Pace
INSTALLED ROM VERSION: huangheUS-2.8.4.0
PACE STOCK US/INTERNATIONAL ROM FOUND
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ROM INSTALLATION
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CHECKING ADB ROOT
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NOK, adb root not detected in Stock International Firmware...
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INSTALLING TEMPORAL ROOT FOR INTERNATIONAL WATCH MODEL
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REBOOTING WATCH IN FASTBOOT MODE
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INSTALLING TEMPORAL ROOT
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< waiting for any device >
Downloading 'boot.img' FAILED (Write to device failed in SendBuffer() (Too many open files in system))
Finished. Total time: 0.170s
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WAITING FOR adb CONNECTION
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COPYING FILES TO WATCH. THIS WILL TAKE A WHILE
************************************************
*************************
COPYING start_update.sh
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AutoPlay\Docs\rom\start_update.sh: 1 file pushed. 0.0 MB/s (956 bytes in 0.050s)
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COPYING md5s.txt
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AutoPlay\Docs\rom\md5s.txt: 1 file pushed.
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COPYING recovery.img
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adb: error: failed to copy 'AutoPlay\Docs\rom\recovery.img' to '/sdcard/recovery.img': no response: Connection reset by peer
Attempt No.: 1/5
adb connection lost or something went wrong. Retrying......
adb: error: failed to get feature set: no devices found
Attempt No.: 2/5
adb connection lost or something went wrong. Retrying......
adb: error: failed to get feature set: no devices found
Attempt No.: 3/5
adb connection lost or something went wrong. Retrying......
adb: error: failed to get feature set: no devices found
Attempt No.: 4/5
adb connection lost or something went wrong. Retrying......
Attempt No.: 5/5
Too much attempts copying files
Aborted installation
Press any key to continue . . .