why half of the sky is black in unreal engine 5.8?

[Vikasraj0411]

I recently updated the project from 5.7 to 5.8 and suddenly half of the sky went black, So I created this test level and added the lights through the Env. Light Mixer. Is there any solution to fix this issue.

Note: I have created the fresh project in 5.8, and its completely fine without any error, I want to fix this cuz I have almost completed the project in that 5.7 file and due to usage of other pipeline I want to continue the project by converting the 5.7 version to 5.8, Kindly help to sort this problem

Thank you