try syncing it

src/main/java/net/montoyo/wd/client/ClientProxy.java

@@ -132,12 +132,12 @@ public class ClientProxy extends SharedProxy implements IDisplayHandler, IJSQuer
     @SubscribeEvent
     public static void onClientSetup(FMLClientSetupEvent event) {
         BlockEntityRenderers.register(TileInit.SCREEN_BLOCK_ENTITY.get(), new ScreenRenderer.ScreenRendererProvider());
+        registerBlockRenderLayers(RenderType.cutout(), BlockInit.blockKeyBoard.get(), BlockInit.blockKbRight.get());
     }
 
     @SubscribeEvent
     public static void onModelRegistryEvent(ModelEvent.RegisterGeometryLoaders event) {
         event.register(ScreenModelLoader.SCREEN_LOADER.getPath(), new ScreenModelLoader());
-        registerBlockRenderLayers(RenderType.cutout(), BlockInit.blockKeyBoard.get(), BlockInit.blockKbRight.get());
     }
 
     private static void registerBlockRenderLayers(RenderType layer, Block... blocks) {

src/main/java/net/montoyo/wd/client/gui/GuiSetURL2.java

@@ -25,6 +25,7 @@ import net.montoyo.wd.utilities.BlockSide;
 import net.montoyo.wd.utilities.Util;
 import net.montoyo.wd.utilities.Vector3i;
 
+import java.io.IOException;
 import java.util.Map;
 
 @Mod.EventBusSubscriber(Dist.CLIENT)
@@ -101,6 +102,13 @@ public class GuiSetURL2 extends WDScreen {
 
     private void validate(String url) {
         if(!url.isEmpty()) {
+
+            try {
+                TileEntityScreen.url(url);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
+
             url = Util.addProtocol(url);
             url = ((ClientProxy) WebDisplays.PROXY).getMCEF().punycode(url);
 

src/main/java/net/montoyo/wd/client/renderers/ScreenRenderer.java

@@ -20,6 +20,8 @@ import net.montoyo.wd.utilities.Vector3f;
 import net.montoyo.wd.utilities.Vector3i;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.IOException;
+
 import static com.mojang.math.Vector3f.*;
 import static org.lwjgl.opengl.GL11.*;
 

src/main/java/net/montoyo/wd/entity/TileEntityInterfaceBase.java

@@ -17,6 +17,7 @@ import net.montoyo.wd.net.client.CMessageScreenUpdate;
 import net.montoyo.wd.utilities.*;
 
 import javax.annotation.Nonnull;
+import java.io.IOException;
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -336,7 +337,11 @@ public abstract class TileEntityInterfaceBase extends TileEntityPeripheralBase {
         else if((scr.getScreen(screenSide).rightsFor(owner.uuid) & ScreenRights.CHANGE_URL) == 0)
             return err("restrictions");
         else {
-            scr.setScreenURL(screenSide, url);
+            try {
+                scr.setScreenURL(screenSide, url);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
             return TRUE;
         }
     }

src/main/java/net/montoyo/wd/entity/TileEntityRedCtrl.java

@@ -22,6 +22,7 @@ import net.montoyo.wd.utilities.BlockSide;
 import net.montoyo.wd.utilities.Util;
 
 import javax.annotation.Nonnull;
+import java.io.IOException;
 
 public class TileEntityRedCtrl extends TileEntityPeripheralBase {
 
@@ -115,8 +116,12 @@ public class TileEntityRedCtrl extends TileEntityPeripheralBase {
         if(isScreenChunkLoaded()) {
             TileEntityScreen tes = getConnectedScreen();
 
-            if(tes != null)
+            if (tes != null)
-                tes.setScreenURL(screenSide, url);
+                try {
+                    tes.setScreenURL(screenSide, url);
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
         }
     }
 }

src/main/java/net/montoyo/wd/net/client/CMessageAddScreen.java

@@ -13,6 +13,7 @@ import net.montoyo.wd.WebDisplays;
 import net.montoyo.wd.entity.TileEntityScreen;
 import net.montoyo.wd.utilities.*;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.function.Supplier;
 
@@ -104,12 +105,20 @@ public class CMessageAddScreen {
             for (TileEntityScreen.Screen entry : screens) {
                 TileEntityScreen.Screen scr = tes.addScreen(entry.side, entry.size, entry.resolution, null, false);
                 scr.rotation = entry.rotation;
-                scr.url = entry.url;
+                String webUrl;
+
+                try {
+                    webUrl = TileEntityScreen.url(entry.url);
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+
+                scr.url = webUrl;
                 scr.owner = entry.owner;
                 scr.upgrades = entry.upgrades;
 
                 if (scr.browser != null)
-                    scr.browser.loadURL(entry.url);
+                    scr.browser.loadURL(webUrl);
             }
 
         });

src/main/java/net/montoyo/wd/net/client/CMessageScreenUpdate.java

@@ -17,6 +17,7 @@ import net.montoyo.wd.init.BlockInit;
 import net.montoyo.wd.utilities.*;
 
 import javax.annotation.Nullable;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.function.Supplier;
 
@@ -252,7 +253,13 @@ public class CMessageScreenUpdate {
             TileEntityScreen tes = (TileEntityScreen) te;
     
                 switch (action) {
-                    case UPDATE_URL -> tes.setScreenURL(side, string);
+                    case UPDATE_URL -> {
+                        try {
+                            tes.setScreenURL(side, string);
+                        } catch (IOException e) {
+                            throw new RuntimeException(e);
+                        }
+                    }
                     case UPDATE_MOUSE -> tes.handleMouseEvent(side, mouseEvent, vec2i);
                     case UPDATE_DELETE -> tes.removeScreen(side);
                     case UPDATE_RESOLUTION -> tes.setResolution(side, vec2i);

src/main/java/net/montoyo/wd/net/server/SMessageScreenCtrl.java

@@ -24,6 +24,7 @@ import net.montoyo.wd.init.BlockInit;
 import net.montoyo.wd.init.ItemInit;
 import net.montoyo.wd.utilities.*;
 
+import java.io.IOException;
 import java.util.function.Supplier;
 
 public class SMessageScreenCtrl implements Runnable {
@@ -309,7 +310,11 @@ public class SMessageScreenCtrl implements Runnable {
 
         if(ctrl == CTRL_SET_URL || ctrl == CTRL_SET_URL_REMOTE) {
             checkPermission(tes, ScreenRights.CHANGE_URL);
-            tes.setScreenURL(side, url);
+            try {
+                tes.setScreenURL(side, url);
+            } catch (IOException e) {
+                throw new RuntimeException(e);
+            }
         } else if(ctrl == CTRL_SHUT_DOWN) {
             //TODO
             //checkPermission(tes, ScreenRights.CHANGE_URL);