我的小项目有一个 gradle 同步失败的情况，这似乎很少见，因为谷歌没有找到任何相关信息。我收到错误：
Gradle sync failed: removeContentEntry: removed content entry url 'file://C:/Users/BenutzerA/IdeaProjects/EtikettenScanner1/app' still exists after removing (2 s 337 ms)
干净的构建没有帮助。“使缓存无效/重新启动”没有帮助。到目前为止，这似乎是唯一遇到此问题的项目。我切换到其他 3 个项目，它们都构建没有问题。
项目使用 Kotlin、Android、Google 服务
有人给我提示吗？
idea.log 的一部分：
021-02-15 20:39:10,076 [4053612] WARN - e.project.sync.GradleSyncState - removeContentEntry: removed content entry url 'file://C:/Users/BenutzerA/IdeaProjects/EtikettenScanner1/app' still exists after removing
java.lang.IllegalStateException: removeContentEntry: removed content entry url 'file://C:/Users/BenutzerA/IdeaProjects/EtikettenScanner1/app' still exists after removing
at com.intellij.workspaceModel.ide.impl.legacyBridge.module.roots.ModifiableRootModelBridgeImpl.removeContentEntry(ModifiableRootModelBridgeImpl.kt:209)
at com.android.tools.idea.gradle.project.sync.setup.module.common.ContentEntriesSetup.removeExistingContentEntries(ContentEntriesSetup.java:47)
at com.android.tools.idea.gradle.project.sync.setup.module.ndk.NdkModuleCleanupStep.cleanUpModule(NdkModuleCleanupStep.java:42)
at com.android.tools.idea.gradle.project.sync.idea.data.service.NdkModuleModelDataService.onModelNotFound(NdkModuleModelDataService.java:78)
at com.android.tools.idea.gradle.project.sync.idea.data.service.ModuleModelDataService.onModelsNotFound(ModuleModelDataService.java:64)
at com.android.tools.idea.gradle.project.sync.idea.data.service.ModuleModelDataService.importData(ModuleModelDataService.java:49)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.doImportData(ProjectDataManagerImpl.java:252)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:120)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:206)
at com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManagerImpl.importData(ProjectDataManagerImpl.java:213)
at com.android.tools.idea.gradle.project.sync.idea.IdeaSyncPopulateProjectTask.populateProject(IdeaSyncPopulateProjectTask.java:66)
at …