Error with //fixconnections

[Infinite-Blocks]

Hello Arcaniax,

the following error was encountered when executing //fixconnections:
[17:47:14 ERROR]: An unexpected error while handling a FastAsyncWorldEdit command java.lang.NoSuchMethodError: 'boolean net.minecraft.world.level.block.state.IBlockData.isOpaque()' at com.sk89q.worldedit.bukkit.adapter.impl.fawe.v1_20_R3.PaperweightBlockMaterial.isOpaque(PaperweightBlockMaterial.java:78) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at com.arceon.core.command.FixConnectHandler.F(Unknown Source) ~[Arceon-0.4.4_1.16+.jar:?] at com.arceon.core.command.FixConnectHandler.fixconnect(Unknown Source) ~[Arceon-0.4.4_1.16+.jar:?] at com.arceon.core.command.FixConnectHandlerRegistration.A(Unknown Source) ~[Arceon-0.4.4_1.16+.jar:?] at org.enginehub.piston.CommandManager.execute(CommandManager.java:157) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at com.sk89q.worldedit.extension.platform.PlatformCommandManager.lambda$handleCommandOnCurrentThread$16(PlatformCommandManager.java:725) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at com.sk89q.worldedit.extension.platform.PlatformCommandManager.handleCommandTask(PlatformCommandManager.java:746) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at com.sk89q.worldedit.extension.platform.PlatformCommandManager.handleCommandOnCurrentThread(PlatformCommandManager.java:727) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at com.sk89q.worldedit.extension.platform.PlatformCommandManager.lambda$handleCommand$14(PlatformCommandManager.java:698) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at com.sk89q.worldedit.extension.platform.AbstractPlayerActor.lambda$runAction$1(AbstractPlayerActor.java:672) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at com.fastasyncworldedit.core.util.task.AsyncNotifyKeyedQueue.lambda$run$0(AsyncNotifyKeyedQueue.java:48) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at com.fastasyncworldedit.core.util.task.AsyncNotifyKeyedQueue.lambda$call$1(AsyncNotifyKeyedQueue.java:58) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[?:?] at com.fastasyncworldedit.core.util.task.KeyQueuedExecutorService$KeyRunner.lambda$run$0(KeyQueuedExecutorService.java:150) ~[FastAsyncWorldEdit-Bukkit-2.9.1-SNAPSHOT-669.jar:?] at java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1395) ~[?:?] 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) ~[?:?]
Please have this fixed as soon as possible. Thank you.

Regards,
Simon Wilka