Pink screen in unity2021.312f1 in IOS iphone 12 and later

Hi,
Recently i upgraded my project from unity version 2020.3.25f1 to 2021.3.12f1, and i am getting pink screen in my scene while playing my game on IOS build in iPhone 12 and later. It was perfectly working on older version 2020.3.25f1 on Editor as well as iPhone and it is also working fine on Editor in upgraded version 2021.3.12f1, but it is not working in iPhone. Please help me.