Exception when opening "Search structurally" in a freshly opened project

[fan-tom]

com.intellij.openapi.project.IndexNotReadyException: Please change caller according to com.intellij.openapi.project.IndexNotReadyException documentation
	at com.intellij.openapi.project.IndexNotReadyException.create(IndexNotReadyException.java:67)
	at com.intellij.util.indexing.FileBasedIndexImpl.handleDumbMode(FileBasedIndexImpl.java:821)
	at com.intellij.util.indexing.FileBasedIndexImpl.ensureUpToDate(FileBasedIndexImpl.java:769)
	at com.intellij.util.indexing.FileBasedIndexEx.processExceptions(FileBasedIndexEx.java:296)
	at com.intellij.util.indexing.FileBasedIndexEx.processValueIterator(FileBasedIndexEx.java:391)
	at com.intellij.util.indexing.FileBasedIndexEx.processValuesInScope(FileBasedIndexEx.java:357)
	at com.intellij.util.indexing.FileBasedIndexImpl.processValuesInScope(FileBasedIndexImpl.java:1098)
	at com.intellij.util.indexing.FileBasedIndexEx.getValues(FileBasedIndexEx.java:121)
	at com.github.fantom.codeowners.indexing.CodeownersFilesIndex$Companion.getEntries(CodeownersFilesIndex.kt:68)
	at com.github.fantom.codeowners.CodeownersManager.cachedCodeownersFilesIndex$lambda$1(CodeownersManager.kt:114)
	at com.github.fantom.codeowners.util.CachedConcurrentMap$get$1.invoke(CachedConcurrentMap.kt:19)
	at com.github.fantom.codeowners.util.CachedConcurrentMap.get$lambda$0(CachedConcurrentMap.kt:19)
	at java.base/java.util.concurrent.ConcurrentMap.computeIfAbsent(ConcurrentMap.java:330)
	at com.github.fantom.codeowners.util.CachedConcurrentMap.get(CachedConcurrentMap.kt:19)
	at com.github.fantom.codeowners.CodeownersManager.getCodeownersFiles(CodeownersManager.kt:196)
	at com.github.fantom.codeowners.search.CodeownersSearchScopeDescriptor.getScope(CodeownersSearchScopeDescriptor.kt:30)
	at com.intellij.structuralsearch.plugin.ui.ScopePanel.lambda$static$0(ScopePanel.java:56)
	at com.intellij.ide.util.scopeChooser.ScopeChooserCombo.lambda$rebuildModelAndSelectScopeOnSuccess$1(ScopeChooserCombo.java:203)
	at com.intellij.ide.util.scopeChooser.ScopeModel$Companion.doProcessScopes(ScopeModel.kt:115)
	at com.intellij.ide.util.scopeChooser.ScopeModel$Companion.access$doProcessScopes(ScopeModel.kt:79)
	at com.intellij.ide.util.scopeChooser.ScopeModel$getScopeDescriptors$1$1.invoke(ScopeModel.kt:73)
	at com.intellij.ide.util.scopeChooser.ScopeModel$getScopeDescriptors$1$1.invoke(ScopeModel.kt:71)
	at com.intellij.ide.util.scopeChooser.ScopeModel$getScopeDescriptors$1.invoke$lambda$0(ScopeModel.kt:71)
	at org.jetbrains.concurrency.AsyncPromise$then$1$1.invoke(AsyncPromise.kt:144)
	at org.jetbrains.concurrency.AsyncPromise.then$lambda$8$lambda$7(AsyncPromise.kt:142)
	at java.base/java.util.concurrent.CompletableFuture$UniApply.tryFire(CompletableFuture.java:646)
	at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510)
	at java.base/java.util.concurrent.CompletableFuture.complete(CompletableFuture.java:2147)
	at org.jetbrains.concurrency.AsyncPromise.setResult(AsyncPromise.kt:188)
	at com.intellij.psi.search.PredefinedSearchScopeProviderImpl$getPredefinedScopesAsync$2.invoke(PredefinedSearchScopeProviderImpl.kt:81)
	at com.intellij.psi.search.PredefinedSearchScopeProviderImpl$getPredefinedScopesAsync$2.invoke(PredefinedSearchScopeProviderImpl.kt:78)
	at com.intellij.psi.search.PredefinedSearchScopeProviderImpl.getPredefinedScopesAsync$lambda$1(PredefinedSearchScopeProviderImpl.kt:78)
	at com.intellij.openapi.application.impl.NonBlockingReadActionImpl$Submission.lambda$safeTransferToEdt$7(NonBlockingReadActionImpl.java:717)
	at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:194)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:843)
	at com.intellij.openapi.application.impl.ApplicationImpl$4.run(ApplicationImpl.java:463)
	at com.intellij.openapi.application.impl.RwLockHolder.runWithEnabledImplicitRead(RwLockHolder.kt:75)
	at com.intellij.openapi.application.impl.RwLockHolder.runWithImplicitRead(RwLockHolder.kt:67)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWithImplicitRead(ApplicationImpl.java:1436)
	at com.intellij.openapi.application.impl.FlushQueue.doRun(FlushQueue.java:82)
	at com.intellij.openapi.application.impl.FlushQueue.runNextEvent(FlushQueue.java:124)
	at com.intellij.openapi.application.impl.FlushQueue.flushNow(FlushQueue.java:44)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:792)
	at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:739)
	at java.desktop/java.awt.EventQueue$3.run(EventQueue.java:733)
	at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:761)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.kt:695)
	at com.intellij.ide.IdeEventQueue._dispatchEvent$lambda$12(IdeEventQueue.kt:589)
	at com.intellij.openapi.application.impl.RwLockHolder.runWithoutImplicitRead(RwLockHolder.kt:44)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:589)
	at com.intellij.ide.IdeEventQueue.access$_dispatchEvent(IdeEventQueue.kt:72)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:355)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:354)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:793)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:354)
	at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:349)
	at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1014)
	at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:106)
	at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1014)
	at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$7(IdeEventQueue.kt:349)
	at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:848)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:391)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:207)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:128)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:117)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:105)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:92)