Error: A suspiciously high nesting of suppressPrioritizing, forgot to call restorePrioritizing

Hello,
I'm trying to fix the next issue in the plugin: Error: A suspiciously high nesting of suppressPrioritizing, forgot to call restorePrioritizing.
In the plugin we have StructureViewTreeElement and in the getChildren() method it calls PsiTreeUtil.hasErrorElements(psiFile). And this part produces such an error.

Maybe someone could suggest how to fix it? 

Full error

 A suspiciously high nesting of suppressPrioritizing, forgot to call restorePrioritizing?
 
 java.lang.Throwable
at com.intellij.idea.IdeaLogger.error(IdeaLogger.java:131)
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:384)
at com.intellij.openapi.progress.impl.CoreProgressManager.suppressPrioritizing(CoreProgressManager.java:824)
at com.intellij.openapi.progress.impl.CoreProgressManager.avoidBlockingPrioritizingThread(CoreProgressManager.java:879)
at com.intellij.openapi.progress.impl.CoreProgressManager.sleepIfNeededToGivePriorityToAnotherThread(CoreProgressManager.java:840)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.runCheckCanceledHooks(ProgressManagerImpl.java:192)
at com.intellij.openapi.progress.impl.CoreProgressManager.doCheckCanceled(CoreProgressManager.java:145)
at com.intellij.openapi.progress.ProgressManager.checkCanceled(ProgressManager.java:231)
at com.intellij.openapi.progress.ProgressIndicatorProvider.checkCanceled(ProgressIndicatorProvider.java:23)
at com.intellij.psi.impl.source.tree.CompositeElement.getPsi(CompositeElement.java:676)
at com.intellij.psi.impl.source.SourceTreeToPsiMap.treeElementToPsi(SourceTreeToPsiMap.java:15)
at com.intellij.psi.impl.source.tree.SharedImplUtil.getNextSibling(SharedImplUtil.java:45)
at com.intellij.psi.impl.source.tree.LeafPsiElement.getNextSibling(LeafPsiElement.java:61)
at com.intellij.psi.SyntaxTraverser$PsiApi.next(SyntaxTraverser.java:308)
at com.intellij.psi.SyntaxTraverser$PsiApi.next(SyntaxTraverser.java:264)
at com.intellij.psi.SyntaxTraverser$ApiEx$1.fun(SyntaxTraverser.java:254)
at com.intellij.util.containers.JBIterable$2$1.nextImpl(JBIterable.java:129)
at com.intellij.util.containers.JBIterator.peekNext(JBIterator.java:132)
at com.intellij.util.containers.JBIterator.hasNext(JBIterator.java:92)
at com.intellij.util.containers.TreeTraversal$BiOrderIt.nextImpl(TreeTraversal.java:498)
at com.intellij.util.containers.JBIterator.peekNext(JBIterator.java:132)
at com.intellij.util.containers.JBIterator.hasNext(JBIterator.java:92)
at com.intellij.util.containers.JBIterable.isEmpty(JBIterable.java:762)
at com.intellij.psi.util.PsiTreeUtil.hasErrorElements(PsiTreeUtil.java:1222)
at ui.structureview.MyStructureViewRootElement.getChildren(MyStructureViewElements.kt:85)
at ui.structureview.MyStructureViewRootElement.getChildren(MyStructureViewElements.kt:69)
at com.intellij.ide.util.treeView.smartTree.TreeElementWrapper.initChildren(TreeElementWrapper.java:35)
at com.intellij.ide.util.treeView.smartTree.CachingChildrenTreeNode.rebuildSubtree(CachingChildrenTreeNode.java:207)
at com.intellij.ide.util.treeView.smartTree.CachingChildrenTreeNode.ensureChildrenAreInitialized(CachingChildrenTreeNode.java:41)
at com.intellij.ide.util.treeView.smartTree.CachingChildrenTreeNode.getChildre
<TRIMMED STACKTRACE>
ctionAndCancelBeforeWrite(ProgressIndicatorUtilService.java:63)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runActionAndCancelBeforeWrite(ProgressIndicatorUtils.java:133)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.lambda$runWithWriteActionPriority$1(ProgressIndicatorUtils.java:114)
at com.intellij.openapi.progress.ProgressManager.lambda$runProcess$0(ProgressManager.java:71)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:186)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$executeProcessUnderProgress$13(CoreProgressManager.java:604)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:679)
at com.intellij.openapi.progress.impl.CoreProgressManager.computeUnderProgress(CoreProgressManager.java:635)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:603)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:61)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:173)
at com.intellij.openapi.progress.ProgressManager.runProcess(ProgressManager.java:71)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runWithWriteActionPriority(ProgressIndicatorUtils.java:111)
at com.intellij.openapi.progress.util.ProgressIndicatorUtils.runInReadActionWithWriteActionPriority(ProgressIndicatorUtils.java:76)
at com.intellij.util.concurrency.Invoker.invokeSafely(Invoker.java:188)
at com.intellij.util.concurrency.Invoker.lambda$offerSafely$0(Invoker.java:165)
at com.intellij.util.concurrency.Invoker$Background.lambda$offer$0(Invoker.java:433)
at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:249)
at com.intellij.util.concurrency.BoundedTaskExecutor.access$200(BoundedTaskExecutor.java:31)
at com.intellij.util.concurrency.BoundedTaskExecutor$1.executeFirstTaskAndHelpQueue(BoundedTaskExecutor.java:227)
at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:218)
at com.intellij.util.concurrency.BoundedTaskExecutor$1.run(BoundedTaskExecutor.java:215)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:702)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1$1.run(Executors.java:699)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.util.concurrent.Executors$PrivilegedThreadFactory$1.run(Executors.java:699)
at java.base/java.lang.Thread.run(Thread.java:833)