Try to fix crashes

src/main/java/net/fretux/mindmotion/AscendMindMotion.java

@@ -6,11 +6,8 @@ import net.fretux.mindmotion.command.SanityCommand;
 import net.fretux.mindmotion.event.CombatEvents;
 import net.fretux.mindmotion.event.PlayerTickHandler;
 import net.fretux.mindmotion.network.ModMessages;
-import net.minecraftforge.client.event.RegisterKeyMappingsEvent;
 import net.minecraftforge.common.MinecraftForge;
-import net.minecraftforge.event.RegisterCommandsEvent;
 import net.minecraftforge.eventbus.api.IEventBus;
-import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.ModLoadingContext;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.config.ModConfig;

src/main/java/net/fretux/mindmotion/ConfigMM.java

@@ -1,6 +1,5 @@
 package net.fretux.mindmotion;
 
-import net.minecraft.resources.ResourceLocation;
 import net.minecraftforge.common.ForgeConfigSpec;
 import net.minecraftforge.eventbus.api.SubscribeEvent;
 import net.minecraftforge.fml.common.Mod;

src/main/java/net/fretux/mindmotion/client/effects/IronsSpellbooksCompatMM.java

@@ -1,7 +1,6 @@
 package net.fretux.mindmotion.client.effects;
 
 import net.fretux.mindmotion.ConfigMM;
-import net.fretux.mindmotion.player.PlayerCapabilityProvider;
 import net.minecraft.world.entity.ai.attributes.Attribute;
 import net.minecraft.world.entity.ai.attributes.AttributeInstance;
 import net.minecraft.world.entity.ai.attributes.AttributeModifier;
@@ -30,18 +29,8 @@ public final class IronsSpellbooksCompatMM {
         return ConfigMM.COMMON.TEMPO_PER_MANA_REGEN_PERCENT.get();
     }
 
-    public static boolean isLoaded() {
-        return ModList.get().isLoaded(IRONS_MODID);
-    }
-
-    public static void applyTempo(Player player) {
-        if (!isLoaded()) return;
-        resolveOnce();
-        if (!available) return;
-        player.getCapability(PlayerCapabilityProvider.TEMPO).ifPresent(tempoCap -> {
-            int tempo = tempoCap.getTempo();
-            applyTempoToManaRegen(player, tempo);
-        });
+    public static boolean isNotLoaded() {
+        return !ModList.get().isLoaded(IRONS_MODID);
     }
 
     private static void resolveOnce() {
@@ -60,7 +49,7 @@ public final class IronsSpellbooksCompatMM {
     }
 
     public static void applyTempoToManaRegen(Player player, int tempo) {
-        if (!isLoaded()) return;
+        if (isNotLoaded()) return;
         resolveOnce();
         if (!available) return;
         Attribute manaRegenAttr = getManaRegenAttribute();

src/main/java/net/fretux/mindmotion/command/SanityCommand.java

@@ -21,7 +21,7 @@ public class SanityCommand {
                             ServerPlayer player = ctx.getSource().getPlayer();
                             float sanity = FloatArgumentType.getFloat(ctx, "sanity");
                             float insanity = FloatArgumentType.getFloat(ctx, "insanity");
-
+                            assert player != null;
                             player.getCapability(PlayerCapabilityProvider.SANITY).ifPresent(cap -> {
                                 cap.setSanity(sanity);
                                 cap.setInsanity(insanity);

src/main/java/net/fretux/mindmotion/network/ModMessages.java

@@ -11,7 +11,7 @@ public class ModMessages {
 
     private static final String PROTOCOL_VERSION = "1";
     public static final SimpleChannel CHANNEL = NetworkRegistry.newSimpleChannel(
-            new ResourceLocation(AscendMindMotion.MODID, "main"),
+            ResourceLocation.fromNamespaceAndPath(AscendMindMotion.MODID, "main"),
             () -> PROTOCOL_VERSION,
             PROTOCOL_VERSION::equals,
             PROTOCOL_VERSION::equals

src/main/java/net/fretux/mindmotion/network/VentClientEffectPacket.java

@@ -14,13 +14,12 @@ public class VentClientEffectPacket {
 
     public void toBytes(FriendlyByteBuf buf) {}
 
-    public boolean handle(Supplier<NetworkEvent.Context> ctx) {
+    public void handle(Supplier<NetworkEvent.Context> ctx) {
         ctx.get().enqueueWork(() -> {
             Minecraft mc = Minecraft.getInstance();
             if (mc.player == null) return;
             mc.player.swingTime = 10;
             VentShaderHandler.triggerVentShockwave();
         });
-        return true;
     }
 }

src/main/java/net/fretux/mindmotion/player/PlayerCapabilityProvider.java

@@ -21,9 +21,9 @@ public class PlayerCapabilityProvider {
 
     @SubscribeEvent
     public static void attachCapabilities(AttachCapabilitiesEvent<?> event) {
-        if (event.getObject() instanceof net.minecraft.world.entity.player.Player player) {
-            event.addCapability(new ResourceLocation("mindmotion", "sanity"), new SanityProvider());
-            event.addCapability(new ResourceLocation("mindmotion", "tempo"), new TempoProvider());
+        if (event.getObject() instanceof net.minecraft.world.entity.player.Player) {
+            event.addCapability(ResourceLocation.fromNamespaceAndPath("mindmotion", "sanity"), new SanityProvider());
+            event.addCapability(ResourceLocation.fromNamespaceAndPath("mindmotion", "tempo"), new TempoProvider());
         }
     }