Can't update fimware BLE GW v4

Hi, i can’t update fimware on BLE gateway v4 with any version config tool

Firmware Version|
Hardware Version|4.0

I try upgrade via android app, windows app, from git, try stable and development version
I want to update to get json format

Please take a screenshot about the “Dashboard” page for the gateway. We’ll try to push the OTA file for your gateway.

thanks for fast response

We’ve pushed OTA files for v1.2.5.15a. Please try update again

upgraded, thanks!!!