Fix #389

Tested on Purpur Version: 1.21.5-2430-603c755 (MC: 1.21.5)

src/main/java/net/knarcraft/stargate/portal/PortalSignDrawer.java

@@ -152,7 +152,13 @@ public class PortalSignDrawer {
         ChatColor highlightColor = signData.getHighlightSignColor();
         ChatColor mainColor = signData.getMainSignColor();
 
+        // Initialize all lines as empty to prevent null
         String[] lines = new String[4];
+        lines[0] = "";
+        lines[1] = "";
+        lines[2] = "";
+        lines[3] = "";
+
         setLine(signData, 0, highlightColor + "-" + mainColor + translateAllColorCodes(portal.getName()) +
                 highlightColor + "-", lines);
 

src/main/java/net/knarcraft/stargate/utility/SignHelper.java

@@ -1,5 +1,6 @@
 package net.knarcraft.stargate.utility;
 
+import net.knarcraft.stargate.Stargate;
 import org.bukkit.DyeColor;
 import org.bukkit.block.Sign;
 import org.bukkit.block.sign.Side;
@@ -75,11 +76,11 @@ public final class SignHelper {
      */
     private static boolean hasSignSides() {
         try {
-            Class.forName("Side");
             Class<?> aClass = Class.forName("org.bukkit.block.Sign");
             aClass.getMethod("getSide", Side.class);
             return true;
         } catch (ClassNotFoundException | NoSuchMethodException ignored) {
+            Stargate.debug("SignHelper::hasSignSides", "Detected legacy Spigot");
             return false;
         }
     }