Specified SLF4JServiceProvider does not implement SLF4JServiceProvider interface

[Whitescan]

Describe the issue

Plan appears to be using SLF4J, however it might not be configured / used correctly.
When other plugins provide another version of SLF4J and get loaded to the classloader first, Plan ends up using the wrong version.

Exceptions & Other Logs

Stack Trace

[08:37:30] [Server thread/ERROR]: [Plan] SLF4J(E): Specified SLF4JServiceProvider (at.pcgamingfreaks.MarriageMasterStandalone.libs.at.pcgamingfreaks.Slf4jToJavaLogger) does not implement SLF4JServiceProvider interface
[08:37:30] [Server thread/ERROR]: [Plan] SLF4J(E): Reported exception:
[08:37:30] [Server thread/WARN]: java.lang.ClassCastException: class at.pcgamingfreaks.MarriageMasterStandalone.libs.at.pcgamingfreaks.Slf4jToJavaLogger cannot be cast to class plan.org.slf4j.spi.SLF4JServiceProvider (at.pcgamingfreaks.MarriageMasterStandalone.libs.at.pcgamingfreaks.Slf4jToJavaLogger is in unnamed module of loader 'MarriageMaster-2.8.4-Release.jar' @56f28718; plan.org.slf4j.spi.SLF4JServiceProvider is in unnamed module of loader 'Plan-5.6-build-2965.jar' @7ccadafe)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.slf4j.LoggerFactory.loadExplicitlySpecified(LoggerFactory.java:229)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.slf4j.LoggerFactory.findServiceProviders(LoggerFactory.java:122)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.slf4j.LoggerFactory.bind(LoggerFactory.java:194)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:186)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.slf4j.LoggerFactory.getProvider(LoggerFactory.java:496)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:482)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:431)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:457)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.org.eclipse.jetty.util.component.AbstractLifeCycle.<clinit>(AbstractLifeCycle.java:35)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.delivery.webserver.http.JettyRequestHandler_Factory.newInstance(JettyRequestHandler_Factory.java:92)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.delivery.webserver.http.JettyRequestHandler_Factory.get(JettyRequestHandler_Factory.java:65)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.delivery.webserver.http.JettyRequestHandler_Factory.get(JettyRequestHandler_Factory.java:17)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.getSynchronized(DoubleCheck.java:54)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.get(DoubleCheck.java:45)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.delivery.webserver.http.JettyWebserver_Factory.get(JettyWebserver_Factory.java:55)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.delivery.webserver.http.JettyWebserver_Factory.get(JettyWebserver_Factory.java:14)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.getSynchronized(DoubleCheck.java:54)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.get(DoubleCheck.java:45)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.modules.SystemObjectProvidingModule_ProvideWebserverFactory.get(SystemObjectProvidingModule_ProvideWebserverFactory.java:43)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.modules.SystemObjectProvidingModule_ProvideWebserverFactory.get(SystemObjectProvidingModule_ProvideWebserverFactory.java:14)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.getSynchronized(DoubleCheck.java:54)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.get(DoubleCheck.java:45)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DelegateFactory.get(DelegateFactory.java:38)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.delivery.webserver.WebServerSystem_Factory.get(WebServerSystem_Factory.java:55)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.delivery.webserver.WebServerSystem_Factory.get(WebServerSystem_Factory.java:15)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.getSynchronized(DoubleCheck.java:54)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.get(DoubleCheck.java:45)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.PlanSystem_Factory.get(PlanSystem_Factory.java:112)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.PlanSystem_Factory.get(PlanSystem_Factory.java:27)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.getSynchronized(DoubleCheck.java:54)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//plan.dagger.internal.DoubleCheck.get(DoubleCheck.java:45)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.DaggerPlanBukkitComponent$PlanBukkitComponentImpl.system(DaggerPlanBukkitComponent.java:1294)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.utilities.java.ThreadContextClassLoaderSwap.performOperation(ThreadContextClassLoaderSwap.java:45)
[08:37:30] [Server thread/WARN]: 	at Plan-5.6-build-2965.jar//com.djrapitops.plan.Plan.onEnable(Plan.java:90)
[08:37:30] [Server thread/WARN]: 	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:280)
[08:37:30] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:202)
[08:37:30] [Server thread/WARN]: 	at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109)
[08:37:30] [Server thread/WARN]: 	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520)
[08:37:30] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:671)
[08:37:30] [Server thread/WARN]: 	at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:620)
[08:37:30] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:746)
[08:37:30] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:491)
[08:37:30] [Server thread/WARN]: 	at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:365)
[08:37:30] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1178)
[08:37:30] [Server thread/WARN]: 	at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:313)
[08:37:30] [Server thread/WARN]: 	at java.base/java.lang.Thread.run(Thread.java:1583)

Plugin versions

Plan v5.6 build 2965

MarriageMaster 2.8.4

Additional information

Please check if the issue is within Plan (since it's the only plugin currently effected).
If this is the wrong place I will file a bug report on MarriageMaster's end.

[AuroraLS3]

I don't think I can do anything to this, but I might be incorrect. SLF4J configuration is bit of a mystery to me

[Whitescan]

Issue was resolved on MarriageMaster's end GeorgH93/MarriageMaster#393.
I'm going to assume this wasn't an issue of plan in the first place.

Sorry :)