'Decompiled .class file, bytecode version: 52.0 (Java 8) Source for 'Android API 31 Platform' not found. Android

The following message was displayed at the top of the screen while using Android Studio.

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When I selected Download , the following screen was displayed.

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The emulator function was able to start, but this error still remains. I don't know if it's a failure or an environment. It seems that there is no choice but to look at the situation for a while.

It is installed in "tools"-"SDK Manager"-"SDK Platform". The cause cannot be investigated.

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I have tried to fix it with this link enter link description here, but it does not work for me. Any suggestions ?



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