[Crash] ClassNotFoundException upon load

[LilJagty]

Upon loading up my 1.18.1 modpack, I get a ClassNotFoundException. I am running forge version 39.1.2 and Placebo version 6.1.1. I'll attach my full latest.log , but here's the snippet with the Exception:

[11:37:42] [modloading-worker-0/FATAL]: Failed to load mod class Lshadows/placebo/util/PlaceboTaskQueue; for @EventBusSubscriber annotation java.lang.ClassNotFoundException: shadows.placebo.util.PlaceboTaskQueue at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:138) ~[securejarhandler-1.0.3.jar:?] at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] at java.lang.Class.forName0(Native Method) ~[?:?] at java.lang.Class.forName(Class.java:467) ~[?:?] at net.minecraftforge.fml.javafmlmod.AutomaticEventSubscriber.lambda$inject$6(AutomaticEventSubscriber.java:75) ~[javafmllanguage-1.18.1-39.1.2.jar%23170!/:?] at java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?] at net.minecraftforge.fml.javafmlmod.AutomaticEventSubscriber.inject(AutomaticEventSubscriber.java:62) ~[javafmllanguage-1.18.1-39.1.2.jar%23170!/:?] at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:91) ~[javafmllanguage-1.18.1-39.1.2.jar%23170!/:?] at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:120) ~[fmlcore-1.18.1-39.1.2.jar%23169!/:?] at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) [?:?] at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796) [?:?] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) [?:?] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) [?:?] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) [?:?] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) [?:?] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) [?:?] [11:37:42] [modloading-worker-0/ERROR]: Failed to register automatic subscribers. ModID: placebo, class shadows.placebo.Placebo java.lang.RuntimeException: java.lang.ClassNotFoundException: shadows.placebo.util.PlaceboTaskQueue at net.minecraftforge.fml.javafmlmod.AutomaticEventSubscriber.lambda$inject$6(AutomaticEventSubscriber.java:80) ~[javafmllanguage-1.18.1-39.1.2.jar%23170!/:?] at java.util.ArrayList.forEach(ArrayList.java:1511) ~[?:?] at net.minecraftforge.fml.javafmlmod.AutomaticEventSubscriber.inject(AutomaticEventSubscriber.java:62) ~[javafmllanguage-1.18.1-39.1.2.jar%23170!/:?] at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:91) ~[javafmllanguage-1.18.1-39.1.2.jar%23170!/:?] at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:120) ~[fmlcore-1.18.1-39.1.2.jar%23169!/:?] at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) [?:?] at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796) [?:?] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) [?:?] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) [?:?] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) [?:?] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) [?:?] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) [?:?] Caused by: java.lang.ClassNotFoundException: shadows.placebo.util.PlaceboTaskQueue at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:138) ~[securejarhandler-1.0.3.jar:?] at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] at java.lang.Class.forName0(Native Method) ~[?:?] at java.lang.Class.forName(Class.java:467) ~[?:?] at net.minecraftforge.fml.javafmlmod.AutomaticEventSubscriber.lambda$inject$6(AutomaticEventSubscriber.java:75) ~[javafmllanguage-1.18.1-39.1.2.jar%23170!/:?] ... 11 more

[LilJagty]

latest.log

[Shadows-of-Fire]

You have two placebo jar files installed.