java.lang.NullPointerException: This exception has no message.
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Thrown when an application is trying to use or access an object whose reference equals to null but if you are getting no message, try using the option
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java.lang.NullPointerException:
at java.io.Reader.
(Reader.java:78) at java.io.InputStreamReader.
(InputStreamReader.java:113) at cn.nukkit.utils.Utils.readFile(Utils.java:58)
at cn.nukkit.Server.
(Server.java:210) at cn.nukkit.Nukkit.main(Nukkit.java:65)