Plugin exception

[Claytonious]

Please file this bug report at https://github.com/flutter/flutter-intellij/issues/new.

---

What happened

Loading project

Version information

JetBrains Rider 2025.3.1 • Flutter plugin io.flutter 88.2.0 • Dart plugin 502.0.0

Error getting Flutter sdk information.

Exception

null

java.lang.NoClassDefFoundError: com/jetbrains/lang/dart/util/DotPackagesFileUtil
	at io.flutter.pub.PubRoot.getPackagesMap(PubRoot.java:321)
	at io.flutter.sdk.FlutterPluginsLibraryManager.getFlutterPluginPaths(FlutterPluginsLibraryManager.java:141)
	at io.flutter.sdk.FlutterPluginsLibraryManager.lambda$updateFlutterPluginsImpl$0(FlutterPluginsLibraryManager.java:125)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$OTelMonitor.callWrapped(NonBlockingReadActionImpl.java:929)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$OTelMonitor$MonitoredComputation.call(NonBlockingReadActionImpl.java:961)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.insideReadAction(NonBlockingReadActionImpl.java:685)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$attemptComputation$6(NonBlockingReadActionImpl.java:648)
	at com.intellij.platform.locking.impl.NestedLocksThreadingSupport.tryRunReadAction(NestedLocksThreadingSupport.kt:902)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1237)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runInReadActionWithWriteActionPriority$0(ProgressIndicatorUtils.java:94)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtilService.runActionAndCancelBeforeWrite(ProgressIndicatorUtilService.java:73)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runActionAndCancelBeforeWrite(ProgressIndicatorUtils.java:152)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runWithWriteActionPriority$1(ProgressIndicatorUtils.java:139)
	at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:98)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:256)
	at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$14(CoreProgressManager.java:717)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:792)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:748)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:716)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:75)
	at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:240)
	at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:98)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runWithWriteActionPriority(ProgressIndicatorUtils.java:136)
	at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runInReadActionWithWriteActionPriority(ProgressIndicatorUtils.java:94)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.attemptComputation(NonBlockingReadActionImpl.java:648)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$transferToBgThread$1(NonBlockingReadActionImpl.java:529)
	at com.intellij.concurrency.ThreadContext.installThreadContext(threadContext.kt:305)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$transferToBgThread$2(NonBlockingReadActionImpl.java:529)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:735)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:732)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
	at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:732)
	at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.lang.ClassNotFoundException: com.jetbrains.lang.dart.util.DotPackagesFileUtil PluginClassLoader(plugin=PluginMainDescriptor(name=Flutter, id=io.flutter, version=88.2.0, isBundled=false, path=~\AppData\Roaming\JetBrains\Rider2025.3\plugins\flutter-intellij), packagePrefix=null, state=active, parents=ContentModuleDescriptor(id=intellij.vcs.git/terminal, package=git4idea.terminal, descriptorPath=intellij.vcs.git.terminal.xml) <- PluginMainDescriptor(name=Git, id=Git4Idea, version=253.29346.144, package=git4idea, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\vcs-git), ContentModuleDescriptor(id=intellij.vcs.git.frontend, package=com.intellij.vcs.git.frontend) <- PluginMainDescriptor(name=Git, id=Git4Idea, version=253.29346.144, package=git4idea, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\vcs-git), ContentModuleDescriptor(id=intellij.vcs.git.coverage, package=com.intellij.vcs.git.coverage) <- PluginMainDescriptor(name=Git, id=Git4Idea, version=253.29346.144, package=git4idea, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\vcs-git), ContentModuleDescriptor(id=intellij.yaml, loadingRule=EMBEDDED) <- PluginMainDescriptor(name=YAML, id=org.jetbrains.plugins.yaml, version=253.29346.144, package=org.jetbrains.yaml, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\yaml), ContentModuleDescriptor(id=intellij.platform.coverage) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.vcs.log.graph) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.relaxng) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.vcs.log) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.vcs.dvcs) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.scriptDebugger.protocolReaderRuntime) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.scriptDebugger.backend) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.scriptDebugger.ui) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.tasks) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.collaborationTools.auth.base) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.collaborationTools.auth) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.vcs.impl) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.vcs.log.impl) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.vcs.dvcs.impl) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.collaborationTools) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.spellchecker) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.spellchecker.xml) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.platform.tasks.impl) <- PluginMainDescriptor(name=IDEA CORE, id=com.intellij, version=253.29346.144, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\lib), ContentModuleDescriptor(id=intellij.yaml.frontend.split) <- PluginMainDescriptor(name=YAML, id=org.jetbrains.plugins.yaml, version=253.29346.144, package=org.jetbrains.yaml, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\yaml), ContentModuleDescriptor(id=intellij.yaml.backend) <- PluginMainDescriptor(name=YAML, id=org.jetbrains.plugins.yaml, version=253.29346.144, package=org.jetbrains.yaml, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\yaml), ContentModuleDescriptor(id=intellij.yaml.helm) <- PluginMainDescriptor(name=YAML, id=org.jetbrains.plugins.yaml, version=253.29346.144, package=org.jetbrains.yaml, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\yaml), ContentModuleDescriptor(id=intellij.vcs.git.shared, loadingRule=EMBEDDED) <- PluginMainDescriptor(name=Git, id=Git4Idea, version=253.29346.144, package=git4idea, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\vcs-git), ContentModuleDescriptor(id=intellij.vcs.git/localHistory, descriptorPath=intellij.vcs.git.localHistory.xml) <- PluginMainDescriptor(name=Git, id=Git4Idea, version=253.29346.144, package=git4idea, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\vcs-git), PluginMainDescriptor(name=YAML, id=org.jetbrains.plugins.yaml, version=253.29346.144, package=org.jetbrains.yaml, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\yaml), PluginMainDescriptor(name=Git, id=Git4Idea, version=253.29346.144, package=git4idea, isBundled=true, path=C:\Program Files\JetBrains\JetBrains Rider 2023.1.1\plugins\vcs-git), PluginMainDescriptor(name=Dart, id=Dart, version=502.0.0, isBundled=false, path=~\AppData\Roaming\JetBrains\Rider2025.3\plugins\Dart), )
	at com.intellij.ide.plugins.cl.PluginClassLoader.loadClass(PluginClassLoader.kt:149)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:526)
	... 35 more

Flutter log

2026-01-22 17:48:21 io.flutter.jxbrowser.JxBrowserManager [INFO   ] voqsclient: Installing JxBrowser  
2026-01-22 17:48:21 io.flutter.FlutterInitializer [INFO   ] Executing Flutter plugin startup for project: voqsclient  
2026-01-22 17:48:21 io.flutter.jxbrowser.JxBrowserManager [INFO   ] voqsclient: JxBrowser platform files already exist, skipping download  
2026-01-22 17:48:21 io.flutter.jxbrowser.JxBrowserManager [INFO   ] Loaded JxBrowser files successfully  
2026-01-22 17:48:21 io.flutter.FlutterInitializer [INFO   ] Flutter module has been found for project: voqsclient  
2026-01-22 17:48:21 io.flutter.FlutterInitializer [INFO   ] Flutter module has been found for project: voqsclient  
2026-01-22 17:48:22 io.flutter.run.daemon.DeviceDaemon [INFO   ] starting Flutter device daemon #1: C:/flutter/flutter_windows_3.38.5-stable/flutter/bin/flutter.bat daemon  
2026-01-22 17:48:22 io.flutter.sdk.FlutterCommand [INFO   ] flutter.bat [--no-color, config, --machine]  
2026-01-22 17:48:23 io.flutter.run.daemon.DeviceDaemon [INFO   ] flutter device daemon #1: Device daemon started.  
2026-01-22 17:48:23 io.flutter.sdk.FlutterSdk [INFO   ] flutter config --machine (1578ms)  

[pq]

Hey @Claytonious. Sorry for the hassle. Are you able to update the Flutter Plugin? Updating to the latest (89.0.0) should resolve this issue.

[Claytonious]

I don't have good repro steps on my end, so we'll just have to keep an eye out I guess? No problems updating, anyway.