Failed to open PE1.2.9 File

[LHS1998]

Searching for legacy chunks, may take a while...
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.iq80.leveldb.util.ByteBufferSupport (file:/Users/xi/Downloads/Converter.jar) to method sun.nio.ch.FileChannelImpl.unmap(java.nio.MappedByteBuffer)
WARNING: Please consider reporting this to the maintainers of org.iq80.leveldb.util.ByteBufferSupport
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Exception in thread "main" org.iq80.leveldb.shaded.guava.util.concurrent.UncheckedExecutionException: java.lang.IllegalArgumentException: Unknown persistentId 4
at org.iq80.leveldb.shaded.guava.cache.LocalCache$Segment.get(LocalCache.java:2203)
at org.iq80.leveldb.shaded.guava.cache.LocalCache.get(LocalCache.java:3937)
at org.iq80.leveldb.shaded.guava.cache.LocalCache.getOrLoad(LocalCache.java:3941)
at org.iq80.leveldb.shaded.guava.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824)
at org.iq80.leveldb.impl.TableCache.getTable(TableCache.java:91)
at org.iq80.leveldb.impl.TableCache.newIterator(TableCache.java:79)
at org.iq80.leveldb.impl.TableCache.newIterator(TableCache.java:74)
at org.iq80.leveldb.impl.Version.getLevel0Files(Version.java:146)
at org.iq80.leveldb.impl.DbImpl.internalIterator(DbImpl.java:781)
at org.iq80.leveldb.impl.DbImpl.iterator(DbImpl.java:747)
at org.iq80.leveldb.impl.DbImpl.iterator(DbImpl.java:738)
at org.iq80.leveldb.impl.DbImpl.iterator(DbImpl.java:84)
at com.ljyloo.PE2PC.PE2PC.convertLegacy(PE2PC.java:128)
at com.ljyloo.PE2PC.PE2PC.main(PE2PC.java:71)
Caused by: java.lang.IllegalArgumentException: Unknown persistentId 4
at org.iq80.leveldb.CompressionType.getCompressionTypeByPersistentId(CompressionType.java:34)
at org.iq80.leveldb.table.BlockTrailer.readBlockTrailer(BlockTrailer.java:96)
at org.iq80.leveldb.table.MMapTable.readBlock(MMapTable.java:95)
at org.iq80.leveldb.table.Table.(Table.java:61)
at org.iq80.leveldb.table.MMapTable.(MMapTable.java:48)
at org.iq80.leveldb.impl.TableCache$TableAndFile.(TableCache.java:127)
at org.iq80.leveldb.impl.TableCache$TableAndFile.(TableCache.java:114)
at org.iq80.leveldb.impl.TableCache$1.load(TableCache.java:67)
at org.iq80.leveldb.impl.TableCache$1.load(TableCache.java:62)
at org.iq80.leveldb.shaded.guava.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)
at org.iq80.leveldb.shaded.guava.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)
at org.iq80.leveldb.shaded.guava.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)
at org.iq80.leveldb.shaded.guava.cache.LocalCache$Segment.get(LocalCache.java:2197)
... 13 more
xideMacBook-Pro:~ xi$ java -jar /Users/xi/Downloads/Converter.jar /Users/xi/Documents/games/com.mojang/minecraftWorlds/yC8BAEQmAgA= /Users/xi/Downloads/府关PCVer
Searching for legacy chunks, may take a while...
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.iq80.leveldb.util.ByteBufferSupport (file:/Users/xi/Downloads/Converter.jar) to method sun.nio.ch.FileChannelImpl.unmap(java.nio.MappedByteBuffer)
WARNING: Please consider reporting this to the maintainers of org.iq80.leveldb.util.ByteBufferSupport
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Exception in thread "main" org.iq80.leveldb.shaded.guava.util.concurrent.UncheckedExecutionException: java.lang.IllegalArgumentException: Unknown persistentId 4
at org.iq80.leveldb.shaded.guava.cache.LocalCache$Segment.get(LocalCache.java:2203)
at org.iq80.leveldb.shaded.guava.cache.LocalCache.get(LocalCache.java:3937)