Suppose server

src/main/java/com/github/wohaopa/tc4helper/GuiHandler.java

@@ -0,0 +1,37 @@
+package com.github.wohaopa.tc4helper;
+
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.world.World;
+
+import cpw.mods.fml.common.network.IGuiHandler;
+import thaumcraft.client.gui.GuiResearchTable;
+import thaumcraft.common.container.ContainerResearchTable;
+import thaumcraft.common.tiles.TileResearchTable;
+
+public class GuiHandler implements IGuiHandler {
+
+    private final IGuiHandler guiHandler;
+
+    public GuiHandler(IGuiHandler guiHandler) {
+        this.guiHandler = guiHandler;
+    }
+
+    @Override
+    public Object getServerGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
+        if (TC4Helper.enabled) {
+            if (ID == 0)
+                return new ContainerResearchTable(player.inventory, (TileResearchTable) world.getTileEntity(x, y, z));
+
+            return null;
+        } else return guiHandler.getServerGuiElement(ID, player, world, x, y, z);
+    }
+
+    @Override
+    public Object getClientGuiElement(int ID, EntityPlayer player, World world, int x, int y, int z) {
+        if (TC4Helper.enabled) {
+            if (ID == 0) return new GuiResearchTable(player, (TileResearchTable) world.getTileEntity(x, y, z));
+
+            return null;
+        } else return guiHandler.getClientGuiElement(ID, player, world, x, y, z);
+    }
+}

src/main/java/com/github/wohaopa/tc4helper/TC4Helper.java

@@ -3,47 +3,38 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+import com.github.wohaopa.tc4helper.proxy.IProxy;
+
 import cpw.mods.fml.common.Mod;
 import cpw.mods.fml.common.SidedProxy;
-import cpw.mods.fml.common.event.FMLInitializationEvent;
+import cpw.mods.fml.common.event.FMLLoadCompleteEvent;
 import cpw.mods.fml.common.event.FMLPostInitializationEvent;
-import cpw.mods.fml.common.event.FMLPreInitializationEvent;
-import cpw.mods.fml.common.event.FMLServerStartingEvent;
 
-@Mod(modid = TC4Helper.MODID, version = Tags.VERSION, name = "TC4Helper", acceptedMinecraftVersions = "[1.7.10]")
+@Mod(
+    modid = TC4Helper.MODID,
+    version = Tags.VERSION,
+    name = "TC4Helper",
+    acceptedMinecraftVersions = "[1.7.10]",
+    dependencies = "after:ThaumcraftResearchTweaks")
 public class TC4Helper {
 
     public static final String MODID = "tc4helper";
     public static final Logger LOG = LogManager.getLogger(MODID);
     public static boolean enabled = true;
 
     @SidedProxy(
-        clientSide = "com.github.wohaopa.tc4helper.ClientProxy",
-        serverSide = "com.github.wohaopa.tc4helper.CommonProxy")
-    public static CommonProxy proxy;
-
-    @Mod.EventHandler
-    // preInit "Run before anything else. Read your config, create blocks, items, etc, and register them with the
-    // GameRegistry." (Remove if not needed)
-    public void preInit(FMLPreInitializationEvent event) {
-        proxy.preInit(event);
-    }
+        clientSide = "com.github.wohaopa.tc4helper.proxy.ClientProxy",
+        serverSide = "com.github.wohaopa.tc4helper.proxy.ServerProxy")
+    public static IProxy proxy;
 
     @Mod.EventHandler
-    // load "Do your mod setup. Build whatever data structures you care about. Register recipes." (Remove if not needed)
-    public void init(FMLInitializationEvent event) {
-        proxy.init(event);
-    }
-
-    @Mod.EventHandler
-    // postInit "Handle interaction with other mods, complete your setup based on this." (Remove if not needed)
     public void postInit(FMLPostInitializationEvent event) {
         proxy.postInit(event);
     }
 
     @Mod.EventHandler
-    // register server commands in this event handler (Remove if not needed)
-    public void serverStarting(FMLServerStartingEvent event) {
-        proxy.serverStarting(event);
+    public void complete(FMLLoadCompleteEvent event) {
+        proxy.complete(event);
     }
+
 }

src/main/java/com/github/wohaopa/tc4helper/autoplay/AutoPlayButton.java

@@ -42,7 +42,7 @@ public void onAction(EntityPlayer player, ResearchNoteData note, GuiResearchTabl
 
         switch (autoPlay.getStatus()) {
             case Leisure, Done -> {
-                if (autoPlay.set(obj, player, note)) autoPlay.start();
+                if (note != null) if (autoPlay.set(obj, player, note)) autoPlay.start();
             }
             case Searching -> {
                 autoPlay.abort();

src/main/java/com/github/wohaopa/tc4helper/proxy/ClientProxy.java

@@ -0,0 +1,49 @@
+package com.github.wohaopa.tc4helper.proxy;
+
+import java.lang.reflect.Field;
+import java.util.Map;
+
+import net.minecraftforge.client.ClientCommandHandler;
+
+import com.github.wohaopa.tc4helper.Command;
+import com.github.wohaopa.tc4helper.GuiHandler;
+
+import cpw.mods.fml.common.Loader;
+import cpw.mods.fml.common.ModContainer;
+import cpw.mods.fml.common.event.FMLLoadCompleteEvent;
+import cpw.mods.fml.common.event.FMLPostInitializationEvent;
+import cpw.mods.fml.common.network.IGuiHandler;
+import cpw.mods.fml.common.network.NetworkRegistry;
+
+public class ClientProxy implements IProxy {
+
+    @Override
+    public void postInit(FMLPostInitializationEvent event) {
+        ClientCommandHandler.instance.registerCommand(new Command());
+    }
+
+    @Override
+    public void complete(FMLLoadCompleteEvent event) {
+        if (Loader.isModLoaded("ThaumcraftResearchTweaks")) {
+
+            try {
+                Class<NetworkRegistry> clazz = NetworkRegistry.class;
+                Field field = clazz.getDeclaredField("clientGuiHandlers");
+                field.setAccessible(true);
+                Map<ModContainer, IGuiHandler> clientGuiHandlers = (Map<ModContainer, IGuiHandler>) field
+                    .get(NetworkRegistry.INSTANCE);
+                ModContainer mc = Loader.instance()
+                    .getIndexedModList()
+                    .get("ThaumcraftResearchTweaks");
+
+                NetworkRegistry.INSTANCE
+                    .registerGuiHandler("ThaumcraftResearchTweaks", new GuiHandler(clientGuiHandlers.get(mc)));
+
+            } catch (NoSuchFieldException | IllegalAccessException e) {
+                throw new RuntimeException(e);
+            }
+
+        }
+
+    }
+}

src/main/java/com/github/wohaopa/tc4helper/proxy/IProxy.java

@@ -0,0 +1,11 @@
+package com.github.wohaopa.tc4helper.proxy;
+
+import cpw.mods.fml.common.event.FMLLoadCompleteEvent;
+import cpw.mods.fml.common.event.FMLPostInitializationEvent;
+
+public interface IProxy {
+
+    default void postInit(FMLPostInitializationEvent event) {}
+
+    default void complete(FMLLoadCompleteEvent event) {}
+}

src/main/java/com/github/wohaopa/tc4helper/proxy/ServerProxy.java

@@ -0,0 +1,4 @@
+package com.github.wohaopa.tc4helper.proxy;
+
+public class ServerProxy implements IProxy {
+}