ResponseCode 404 when try to download files from a NextCloud Folder

[KlausAlberts]

org.aarboard.nextcloud nextcloud-api 11.5.1

IntelliJ Ultimate IntelliJ IDEA 2021.2.1 (Ultimate Edition)
Build #IU-212.5080.55, built on August 24, 2021
Java 11

Official and latest NextCloud Docker image without any further configurations

Given Folder structure "http://localhost:8080/apps/files/?dir=/TB/2021/2021-09/28&fileid=23365" contains XML- and PDF-Files.

// 1. Create Connection to NextCloud
NextcloudConnector connector = new NextcloudConnector("localhost", false, "8080", "admin", "mypwd");
// 2. List all files in testFolder = "/TB/2021/2021-09/28"
List fileNames = connector.listFolderContent(testFolder);
for (String fileName : fileNames) {
LOGGER.log(Level.INFO, "filename " + fileName);

    }

3. But when i try to download all files with
   connector.download(fileName);
   then the Exception org.aarboard.nextcloud.api.exception.NextcloudApiException: com.github.sardine.impl.SardineException: status code: 404, reason phrase: Unexpected response (404 Not Found) is thrown:
   Full Stacktrace is:

   at org.aarboard.nextcloud.api.webdav.Folders.listFolderContent(Folders.java:106)
   at org.aarboard.nextcloud.api.webdav.Folders.listFolderContent(Folders.java:83)
   at org.aarboard.nextcloud.api.webdav.Folders.listFolderContent(Folders.java:70)
   at org.aarboard.nextcloud.api.NextcloudConnector.listFolderContent(NextcloudConnector.java:665)
   at de.pkv.nextcloud.NCFolderManagerTest.testGetPDF(NCFolderManagerTest.java:36)
   at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
   at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.base/java.lang.reflect.Method.invoke(Method.java:566)
   at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:686)
   at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
   at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
   at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
   at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
   at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)
   at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
   at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
   at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
   at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
   at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
   at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
   at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
   at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:205)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:201)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:137)
   at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:71)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
   at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
   at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
   at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
   at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
   at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
   at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
   at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
   at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
   at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
   at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248)
   at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211)
   at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199)
   at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:132)
   at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:71)
   at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
   at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
   at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
   Caused by: com.github.sardine.impl.SardineException: status code: 404, reason phrase: Unexpected response (404 Not Found)

[a-schild]

You are trying to download "Filename", but you are missing the path to it.
You will need to tell the download method where in the tree your file ist to be found.

The way you us it, it's trying in the root folder