Unable to downgrade to android 9 from android 10
I am having issues while downgrading to android 9. Now I am in the android 10 beta 4, due to some issues in android 10 I would like to downgrade. For that I have downloaded the latest android 9 build form the asus official site and move it to sd card after that I went to the recovery mode and click on apply from external storage, thereby selecting the android 9 package but it shows me the following error. And i cant able to downgrade please anyone help me to fix this issue.