Documentation not found for older engine

I am developing an android game using Unreal Engine 4.23 . My android SDK and NDK was not configured . So I was expecting going to File ->Package Project ->Android (Multi) would open the online documentation for me. It did open the documentation website but with a 404 error. Then I found that there was no more documentation for 4.23

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Is it an error ? Or is it okay that they removed documentation for older version engines? Is there any way to access those documentations ?