error pex

11:51:04 [INFO] [PermissionsEx] Initializing file backend
11:51:04 [GRAVE] special characters are not allowed initializing PermissionsEx v
1.14 (Is it up to date?)
unacceptable character #FFFD special characters are not allowed
in "<reader>", position 6114
        at org.yaml.snakeyaml.reader.StreamReader.checkPrintable(StreamReader.ja
va:68)
        at org.yaml.snakeyaml.reader.StreamReader.update(StreamReader.java:159)
        at org.yaml.snakeyaml.reader.StreamReader.peek(StreamReader.java:117)
        at org.yaml.snakeyaml.scanner.ScannerImpl.scanPlain(ScannerImpl.java:156
9)
        at org.yaml.snakeyaml.scanner.ScannerImpl.fetchPlain(ScannerImpl.java:86
0)
        at org.yaml.snakeyaml.scanner.ScannerImpl.fetchMoreTokens(ScannerImpl.ja
va:348)
        at org.yaml.snakeyaml.scanner.ScannerImpl.checkToken(ScannerImpl.java:18
3)
        at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockSequenceEntry.produce(
ParserImpl.java:510)
        at org.yaml.snakeyaml.parser.ParserImpl$ParseBlockSequenceFirstEntry.pro
duce(ParserImpl.java:502)
        at org.yaml.snakeyaml.parser.ParserImpl.peekEvent(ParserImpl.java:163)
        at org.yaml.snakeyaml.parser.ParserImpl.checkEvent(ParserImpl.java:148)
        at org.yaml.snakeyaml.composer.Composer.composeSequenceNode(Composer.jav
a:203)
        at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:158)
        at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java
:230)
        at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
        at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java
:230)
        at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
        at org.yaml.snakeyaml.composer.Composer.composeMappingNode(Composer.java
:230)
        at org.yaml.snakeyaml.composer.Composer.composeNode(Composer.java:160)
        at org.yaml.snakeyaml.composer.Composer.composeDocument(Composer.java:12
2)
        at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:105)

        at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseCons
tructor.java:124)
        at org.yaml.snakeyaml.Yaml.load(Yaml.java:264)
        at ru.tehkode.permissions.config.Configuration.load(Configuration.java:6
5)
        at ru.tehkode.permissions.backends.FileBackend.initialize(FileBackend.ja
va:108)
        at ru.tehkode.permissions.PermissionManager.setBackend(PermissionManager
.java:420)
        at ru.tehkode.permissions.PermissionManager.initBackend(PermissionManage
r.java:471)
        at ru.tehkode.permissions.PermissionManager.<init>(PermissionManager.jav
a:53)
        at ru.tehkode.permissions.bukkit.PermissionsEx.onLoad(PermissionsEx.java
:73)
        at org.bukkit.craftbukkit.CraftServer.loadPlugins(CraftServer.java:141)
        at org.bukkit.craftbukkit.CraftServer.<init>(CraftServer.java:103)
        at net.minecraft.server.ServerConfigurationManager.<init>(ServerConfigur
ationManager.java:52)
        at net.minecraft.server.MinecraftServer.init(MinecraftServer.java:136)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:348)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
11:51:04 [ADVERTENCIA] [PermissionsCompat] PermissionsEx plugin not found. Some
plugins may not work.