Alba 4 frp not done

please help to remove frp alba 4 aka (archos AC40AS3G).

Work ID: 000000000024D055
Platform: ARCHOS
Selected model: AC40AS3G
Please, reconnect battery, press and hold "Vol+" or "Vol-" button and connect USB cable.
Searching for a phone. Please wait…
Found phone on COM11
Mobile Status: SPRD3
Sending preloader…
Mobile Status: Spreadtrum Boot Block version 1.1
Sending mainloader…
Reading info…
Brand: alba
Model: ALBA 4
Device: ac40as3g
Platform: sc8830
Android version: 7.0
Display ID: FS280_BS981B_ARCHOS_ALBA4_20170922_V….063747.Serenoa
Searching for signatures…
Operation was failed!
Performed by Software version.

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