'android.enabler8' is deprecated and should not be used anymore

hello, I am using more than one advertising service in a game I am working on. I’m using unity ads and adcolony but whenever I try to use a 3rd service and tying to build the game I get this error:

‘android.enabler8’ is deprecated and should not be used anymore

I looked at the topics in the forum or other forums, there were solutions I tried, but none of them worked.
i tried making comment the R8 code in the gradle.properties but it didnt work.

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Have you fixed it?