Delay registration of various client settings until the client is fully initialized.

src/main/java/appeng/bootstrap/BlockEntityBuilder.java

@@ -11,7 +11,6 @@ import com.google.common.base.Preconditions;
 
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
-import net.fabricmc.fabric.api.client.rendereregistry.v1.BlockEntityRendererRegistry;
 import net.minecraft.block.Block;
 import net.minecraft.block.entity.BlockEntityType;
 import net.minecraft.util.Identifier;
@@ -19,6 +18,7 @@ import net.minecraft.util.registry.Registry;
 
 import appeng.api.features.AEFeature;
 import appeng.block.AEBaseTileBlock;
+import appeng.bootstrap.components.BlockEntityRendererComponent;
 import appeng.bootstrap.components.ITileEntityRegistrationComponent;
 import appeng.bootstrap.definitions.TileEntityDefinition;
 import appeng.core.AppEng;
@@ -115,7 +115,8 @@ public class BlockEntityBuilder<T extends AEBaseBlockEntity> {
     @Environment(EnvType.CLIENT)
     private void buildClient() {
         if (tileEntityRendering.tileEntityRenderer != null) {
-            BlockEntityRendererRegistry.INSTANCE.register(type, tileEntityRendering.tileEntityRenderer);
+            factory.addBootstrapComponent(
+                    new BlockEntityRendererComponent<>(type, tileEntityRendering.tileEntityRenderer));
         }
     }
 

src/main/java/appeng/bootstrap/components/BlockEntityRendererComponent.java

@@ -0,0 +1,33 @@
+package appeng.bootstrap.components;
+
+import java.util.function.Function;
+
+import net.fabricmc.fabric.api.client.rendereregistry.v1.BlockEntityRendererRegistry;
+import net.minecraft.block.entity.BlockEntity;
+import net.minecraft.block.entity.BlockEntityType;
+import net.minecraft.client.render.block.entity.BlockEntityRenderDispatcher;
+import net.minecraft.client.render.block.entity.BlockEntityRenderer;
+
+/**
+ * Registers a block entity renderer for a given block entity type. This must
+ * occur late in the client's initialization, since the constructors of our
+ * block entity renderers rely on the client being fully initialized.
+ */
+public class BlockEntityRendererComponent<T extends BlockEntity> implements IClientSetupComponent {
+
+    private final BlockEntityType<T> type;
+
+    private final Function<BlockEntityRenderDispatcher, BlockEntityRenderer<T>> renderer;
+
+    public BlockEntityRendererComponent(BlockEntityType<T> type,
+            Function<BlockEntityRenderDispatcher, BlockEntityRenderer<T>> renderer) {
+        this.type = type;
+        this.renderer = renderer;
+    }
+
+    @Override
+    public void setup() {
+        BlockEntityRendererRegistry.INSTANCE.register(type, renderer);
+    }
+
+}

src/main/java/appeng/client/AppEngClient.java

@@ -13,6 +13,7 @@ import javax.annotation.Nonnull;
 
 import net.fabricmc.api.EnvType;
 import net.fabricmc.api.Environment;
+import net.fabricmc.fabric.api.client.event.lifecycle.v1.ClientLifecycleEvents;
 import net.fabricmc.fabric.api.client.keybinding.v1.KeyBindingHelper;
 import net.fabricmc.fabric.api.client.model.ModelLoadingRegistry;
 import net.fabricmc.fabric.api.client.particle.v1.ParticleFactoryRegistry;
@@ -184,7 +185,9 @@ public final class AppEngClient extends AppEngBase {
 
         ModelsReloadCallback.EVENT.register(this::onModelsReloaded);
 
-        callDeferredBootstrapComponents(IClientSetupComponent.class, IClientSetupComponent::setup);
+        ClientLifecycleEvents.CLIENT_STARTED.register(client -> {
+            callDeferredBootstrapComponents(IClientSetupComponent.class, IClientSetupComponent::setup);
+        });
         registerModelProviders();
         registerParticleRenderers();
         registerEntityRenderers();