Fix skull on 1.21.1

src/main/java/eu/decentsoftware/holograms/api/utils/items/SkullProfile.java

@@ -0,0 +1,33 @@
+package eu.decentsoftware.holograms.api.utils.items;
+
+import com.mojang.authlib.GameProfile;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.InvocationTargetException;
+
+class SkullProfile {
+    public static Constructor<?> gameProfileField;
+
+    static {
+        try {
+            Class<?> resolvableProfileClass = Class.forName("net.minecraft.world.item.component.ResolvableProfile");
+            Class<?> gameProfileClass = Class.forName("com.mojang.authlib.GameProfile");
+
+            Constructor<?> constructor = resolvableProfileClass.getDeclaredConstructor(gameProfileClass);
+            constructor.setAccessible(true);
+            gameProfileField = constructor;
+
+        } catch (Exception e) {
+            e.printStackTrace();
+            gameProfileField = null;
+        }
+    }
+
+    public static Object getObject(GameProfile profile) {
+        try {
+            return gameProfileField.newInstance(profile);
+        } catch (InstantiationException | IllegalAccessException | InvocationTargetException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}

src/main/java/eu/decentsoftware/holograms/api/utils/items/SkullUtils.java

@@ -148,7 +148,17 @@ public static void setSkullTexture(@NonNull ItemStack itemStack, @NonNull String
 						PROFILE_FIELD = meta.getClass().getDeclaredField("profile");
 						PROFILE_FIELD.setAccessible(true);
 					}
-					PROFILE_FIELD.set(meta, profile);
+
+					// https://hub.spigotmc.org/stash/projects/SPIGOT/repos/craftbukkit/browse/src/main/java/org/bukkit/craftbukkit/inventory/CraftMetaSkull.java?at=8d52226914ce4b99f35be3d6954f35616d92476d
+					// SPIGOT-7882, #1467: Fix conversion of name in Profile Component to empty if it is missing
+					try {
+						PROFILE_FIELD.set(meta, profile);
+					} catch (Throwable ignored) {
+						PROFILE_FIELD.set(
+								meta,
+								SkullProfile.getObject(profile)
+						);
+					}
 				}
 			}
 			itemStack.setItemMeta(meta);