Everything works fine until Unity 2020.0.3f start to make Android build. The problem is that Unity stuck’s on the building process and never finishes.
The only fix that I found is to kill Unity process (can appear as Main Thread in System Monitor), all Java Processes, when this happens. Restart Unity and start the build process again. If it still occurs, keep killing the Unity Process. For me, it starts working after the second or third attempt after killing it.