[javac] Compiling 1683 source files to /home/L2/L2J/L2J_Server/build/bin
[javac] /home/L2/L2J/L2J_Server/java/com/l2jserver/gameserver/handler/UserCommandHandler.java:45: error: cannot find symbol
[javac] registerHandler(new IVoicedCommandHandlerPvpInfo());
[javac] ^
[javac] symbol: class IVoicedCommandHandlerPvpInfo
[javac] location: class UserCommandHandler
[javac] /home/L2/L2J/L2J_Server/java/com/l2jserver/gameserver/network/clientpackets/RequestMagicSkillUse.java:83: error: cannot find symbol
[javac] if (activeChar.getTarget() instanceof L2MonsterInstance)
[javac] ^
[javac] symbol: class L2MonsterInstance
[javac] location: class RequestMagicSkillUse
[javac] 2 errors
BUILD FAILED
need help, i´m new with coding java