The Minimal ADB and Fastboot tool installed on Windows 7, 8 and 10 x64 displays the message cannot read firmware package when you try to update the firmware through ADB Sideload. Compatibility issues cause errors. The ADB tools support Windows 86 bit (x86), and you install it on Windows 64 bit (x64).
The solution is to download Minimal ADB and Fastboot Windows x64. Extract, copy, and paste four files such as adb.exe, AdbWinApi.dll, AdbWinUsbApi.dll and fastboot.exe into the C:\Program Files (x86)\Minimal ADB and Fastboot. After that, restart the ADB tool and update the firmware using ADB Sideload.