NCP Error

[18:14:56 ERROR]: [NoCheatPlus] (TickTask) TickListener generated an exception:
[18:14:56 ERROR]: [NoCheatPlus] java.lang.NoClassDefFoundError: Could not initialize class fr.neatmonster.nocheatplus.compat.BridgeMaterial
        fr.neatmonster.nocheatplus.utilities.map.BlockProperties.isAir(BlockProperties.java:2723)
        fr.neatmonster.nocheatplus.utilities.map.BlockCache.getOrCreateNode(BlockCache.java:314)
        fr.neatmonster.nocheatplus.utilities.map.BlockCache.getOrCreateBlockCacheNode(BlockCache.java:437)
        fr.neatmonster.nocheatplus.utilities.location.RichBoundsLocation.getOrCreateBlockCacheNodeBelow(RichBoundsLocation.java:482)
        fr.neatmonster.nocheatplus.utilities.location.RichBoundsLocation.isOnGround(RichBoundsLocation.java:810)
        fr.neatmonster.nocheatplus.utilities.location.RichEntityLocation.isOnGround(RichEntityLocation.java:180)
        fr.neatmonster.nocheatplus.utilities.location.RichBoundsLocation.isOnGroundOrResetCond(RichBoundsLocation.java:979)
        fr.neatmonster.nocheatplus.checks.moving.MovingListener.checkHover(MovingListener.java:2689)
        fr.neatmonster.nocheatplus.checks.moving.MovingListener.checkOnTickHover(MovingListener.java:2611)
        fr.neatmonster.nocheatplus.checks.moving.MovingListener.onTick(MovingListener.java:2560)
        fr.neatmonster.nocheatplus.utilities.TickTask.notifyListeners(TickTask.java:539)
        fr.neatmonster.nocheatplus.utilities.TickTask.run(TickTask.java:558)
        org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftTask.run(CraftTask.java:99)
        org.bukkit.craftbukkit.v1_16_R3.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:468)
        net.minecraft.server.v1_16_R3.MinecraftServer.b(MinecraftServer.java:1294)
        net.minecraft.server.v1_16_R3.DedicatedServer.b(DedicatedServer.java:377)
        net.minecraft.server.v1_16_R3.MinecraftServer.a(MinecraftServer.java:1209)
        net.minecraft.server.v1_16_R3.MinecraftServer.w(MinecraftServer.java:997)
        net.minecraft.server.v1_16_R3.MinecraftServer.lambda$a$0(MinecraftServer.java:174)
        java.base/java.lang.Thread.run(Thread.java:834)