I get this build error: I removed all my Java + Android and installed it again. My preferences are like this: I can't get rid of that anoying error. Please help.
Which JDK version have you installed? Also note that the error message says "See the Console for details.". You should check the console in Unity editor for the full error message. It could help to know what's wrong. From the provided information we only know that Unity was not able to run android sdk tools to list available platforms, however it's unclear why.