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java.lang.NullPointerException: 	at org.apache.logging.log4j.core.appender.rolling.AbstractRolloverStrategy.getEligibleFiles(AbstractRolloverStrategy.java:107)	at org.apache.logging.log4j.core.appender.rolling.AbstractRolloverStrategy.getEligibleFiles(AbstractRolloverStrategy.java:96)	at org.apache.logging.log4j.core.appender.rolling.AbstractRolloverStrategy.getEligibleFiles(AbstractRolloverStrategy.java:89)	at org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy.purgeAscending(DefaultRolloverStrategy.java:212)	at org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy.purge(DefaultRolloverStrategy.java:199)	at org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy.rollover(DefaultRolloverStrategy.java:326)	at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.rollover(RollingFileManager.java:310)	at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.rollover(RollingFileManager.java:227)	at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.checkRollover(RollingFileManager.java:207)	at org.apache.logging.log4j.core.appender.RollingFileAppender.append(RollingFileAppender.java:267)	at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:156)	at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:129)	at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:120)	at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)	at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:448)	at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:433)	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:417)	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:403)	at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:63)	at org.apache.logging.log4j.core.Logger.logMessage(Logger.java:146)	at org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2091)	at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:1988)	at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1960)	at org.apache.logging.log4j.spi.AbstractLogger.info(AbstractLogger.java:1297)	at my.package.MainKt.main(Main.kt:48)