Install openwrt on hAP lite-tc

Hello,
I have an issue with installing OpenWrt.
The router model is hAP lite TC.
I attempted the installation using Tiny PXE Server.
The Factory image file is successfully deployed on the router, but when I access the OpenWrt panel and try to "Flash new firmware image" by uploading the Sysupgrade image file, it gets stuck on "Checking image..." and does nothing further.

I’ve reset the router multiple times and repeated the steps from the beginning, but the problem persists.
Please help me.