[15:47:52 ERROR]: An unexpected error while handling a WorldEdit command
java.lang.RuntimeException: java.io.IOException: The requested operation cannot be performed on a file with a user-mapped section open
        at com.boydti.fawe.object.clipboard.DiskOptimizedClipboard.<init>(DiskOptimizedClipboard.java:100) ~[?:?]
        at com.boydti.fawe.object.clipboard.DiskOptimizedClipboard.<init>(DiskOptimizedClipboard.java:64) ~[?:?]
        at com.sk89q.worldedit.extent.clipboard.Clipboard.create(Clipboard.java:80) ~[?:?]
        at com.sk89q.worldedit.extent.clipboard.BlockArrayClipboard.<init>(BlockArrayClipboard.java:79) ~[?:?]
        at com.sk89q.worldedit.command.ClipboardCommands.copy(ClipboardCommands.java:135) ~[?:?]
        at com.sk89q.worldedit.command.ClipboardCommandsRegistration.cmd$_copy(ClipboardCommandsRegistration.java:279) ~[?:?]
        at org.enginehub.piston.CommandManager.execute(CommandManager.java:158) ~[?:?]
        at com.sk89q.worldedit.extension.platform.PlatformCommandManager.lambda$handleCommandOnCurrentThread$17(PlatformCommandManager.java:693) ~[?:?]
        at com.sk89q.worldedit.extension.platform.PlatformCommandManager.handleCommandTask(PlatformCommandManager.java:709) ~[?:?]
        at com.sk89q.worldedit.extension.platform.PlatformCommandManager.handleCommandOnCurrentThread(PlatformCommandManager.java:695) ~[?:?]
        at com.sk89q.worldedit.extension.platform.PlatformCommandManager.lambda$handleCommand$15(PlatformCommandManager.java:665) ~[?:?]
        at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftTask.run(CraftTask.java:84) ~[patched_1.15.2.jar:git-Paper-83]
        at org.bukkit.craftbukkit.v1_15_R1.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:54) ~[patched_1.15.2.jar:git-Paper-83]
        at com.destroystokyo.paper.ServerSchedulerReportingWrapper.run(ServerSchedulerReportingWrapper.java:22) ~[patched_1.15.2.jar:git-Paper-83]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:1.8.0_231]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:1.8.0_231]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_231]
Caused by: java.io.IOException: The requested operation cannot be performed on a file with a user-mapped section open
        at java.io.RandomAccessFile.setLength(Native Method) ~[?:1.8.0_231]
        at com.boydti.fawe.object.clipboard.DiskOptimizedClipboard.<init>(DiskOptimizedClipboard.java:92) ~[?:?]
        ... 16 more