--- a/php.nette2/src/org/netbeans/modules/php/nette2/Nette2FrameworkProvider.java	
+++ a/php.nette2/src/org/netbeans/modules/php/nette2/Nette2FrameworkProvider.java	
@@ -42,11 +42,17 @@ 
 package org.netbeans.modules.php.nette2;
 
 import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Set;
+import java.util.logging.Level;
+import java.util.logging.Logger;
 import org.netbeans.modules.php.api.framework.BadgeIcon;
 import org.netbeans.modules.php.api.phpmodule.PhpModule;
 import org.netbeans.modules.php.api.phpmodule.PhpModuleProperties;
@@ -97,9 +103,9 @@ 
         if (!result) {
             FileObject sourceDirectory = phpModule.getSourceDirectory();
             if (sourceDirectory != null) {
-                FileObject bootstrap = sourceDirectory.getFileObject(Constants.COMMON_BOOTSTRAP_PATH);
+                FileObject bootstrap = getFileObject(sourceDirectory, Constants.COMMON_BOOTSTRAP_PATH);
                 result = bootstrap != null && !bootstrap.isFolder() && bootstrap.isValid();
-                FileObject config = sourceDirectory.getFileObject(Constants.COMMON_CONFIG_PATH);
+                FileObject config = getFileObject(sourceDirectory, Constants.COMMON_CONFIG_PATH);
                 result = result && config != null && config.isFolder() && config.isValid();
             }
         }
@@ -181,4 +187,30 @@ 
         return new Nette2CustomizerExtender(phpModule);
     }
 
+    /**
+     * Try to get a FileObject with correct filename case. See bug 238679.
+     *
+     * @param parent Parent FileObject.
+     * @param relPath Relative path, separated by slashes.
+     */
+    private FileObject getFileObject(FileObject parent, String relPath) {
+        File parentFile = FileUtil.toFile(parent);
+        if (parentFile != null) {
+            String nativePath = relPath.replace('/', File.separatorChar);
+            try {
+                Path filePath = parentFile.toPath().resolve(nativePath);
+                if (!Files.exists(filePath)) {
+                    return null;
+                }
+                Path realPath = filePath.toRealPath(LinkOption.NOFOLLOW_LINKS);
+                return FileUtil.toFileObject(realPath.toFile());
+            } catch (IOException ex) {
+                Logger.getLogger(Nette2FrameworkProvider.class.getName()).log(
+                        Level.FINE, null, ex);
+                return null;
+            }
+        } else {
+            return null;
+        }
+    }
 }
--- a/php.symfony2/src/org/netbeans/modules/php/symfony2/commands/Symfony2Script.java	
+++ a/php.symfony2/src/org/netbeans/modules/php/symfony2/commands/Symfony2Script.java	
@@ -47,6 +47,9 @@ 
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.Reader;
+import java.nio.file.Files;
+import java.nio.file.LinkOption;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -117,7 +120,22 @@ 
             // perhaps deleted app dir? fallback to default and let it fail later...
             return null;
         }
-        return appDir.getFileObject(SCRIPT_NAME);
+        File appDirFile = FileUtil.toFile(appDir); // #238679
+        if (appDirFile != null) {
+            try {
+                Path filePath = appDirFile.toPath().resolve(SCRIPT_NAME);
+                if (!Files.exists(filePath)) {
+                    return null;
+                }
+                Path realPath = filePath.toRealPath(LinkOption.NOFOLLOW_LINKS);
+                return FileUtil.toFileObject(realPath.toFile());
+            } catch (IOException ex) {
+                LOGGER.log(Level.FINE, null, ex);
+                return null;
+            }
+        } else {
+            return null;
+        }
     }
 
     /**