Try #2 at explicit path

proxy/src/main/java/com/velocitypowered/proxy/util/FileSystemUtils.java

@@ -28,7 +28,9 @@ import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import java.util.Collections;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
 import java.util.function.Consumer;
 
 public class FileSystemUtils {
@@ -38,18 +40,20 @@ public class FileSystemUtils {
    * path of the given {@link Class}.
    *
    * @param target The target class of the resource path to scan
-   * @param path The path to scan within the resource path
    * @param consumer The consumer to visit the resolved path
+   * @param firstPathComponent First path component
+   * @param remainingPathComponents Remaining path components
    */
   @SuppressFBWarnings({"RCN_REDUNDANT_NULLCHECK_WOULD_HAVE_BEEN_A_NPE"})
-  public static boolean visitResources(Class<?> target, String path, Consumer<Path> consumer)
+  public static boolean visitResources(Class<?> target, Consumer<Path> consumer,
+      String firstPathComponent, String... remainingPathComponents)
       throws IOException {
     final File file = new File(target
         .getProtectionDomain().getCodeSource().getLocation().getPath());
 
     if (file.isFile()) { // jar
       try (FileSystem fileSystem = FileSystems.newFileSystem(file.toPath(), (ClassLoader) null)) {
-        Path toVisit = fileSystem.getPath(path);
+        Path toVisit = fileSystem.getPath(firstPathComponent, remainingPathComponents);
         if (Files.exists(toVisit)) {
           consumer.accept(toVisit);
           return true;
@@ -58,8 +62,12 @@ public class FileSystemUtils {
       }
     } else {
       URI uri;
+      List<String> componentList = new ArrayList<>();
+      componentList.add(firstPathComponent);
+      componentList.addAll(Arrays.asList(remainingPathComponents));
+
       try {
-        URL url = target.getClassLoader().getResource(path);
+        URL url = target.getClassLoader().getResource(String.join("/", componentList));
         if (url == null) {
           return false;
         }