Exception NoClassDefFoundError: JSTypeSerializer after project opened

[absynce]

Exception thrown java.lang.NoClassDefFoundError: Could not initialize class com.intellij.lang.javascript.psi.types.JSTypeSerializer.

This happened a couple of minutes after reindex when opening Pycharm, but without any Elm files open.

intellij-elm: 4.4.1

Pycharm details:

PyCharm 2021.2.3 (Professional Edition)
Build #PY-212.5457.59, built on October 19, 2021
Licensed to Jared Smith
Subscription is active until June 21, 2022.
Runtime version: 11.0.12+7-b1504.40 x86_64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
macOS 12.0.1
GC: ParNew, ConcurrentMarkSweep
Memory: 1979M
Cores: 16
Registry: ide.balloon.shadow.size=0
Non-Bundled Plugins: com.intellij.plugins.visualstudiokeymap (212.4746.57), IdeaVIM (1.7.2), org.elm.klazuka (4.4.1), com.jetbrains.intellij.datalore (0.1.14-212)

Stacktrace:

java.lang.NoClassDefFoundError: Could not initialize class com.intellij.lang.javascript.psi.types.JSTypeSerializer
	at com.intellij.lang.javascript.psi.JSTypeUtils.serializeType(JSTypeUtils.java:167)
	at com.intellij.lang.javascript.psi.stubs.impl.JSStubElementTypeHolder.serialize(JSStubElementTypeHolder.java:52)
	at com.intellij.lang.javascript.psi.stubs.impl.JSQualifiedObjectStubBase.serialize(JSQualifiedObjectStubBase.java:190)
	at com.intellij.lang.javascript.psi.stubs.impl.JSDefinitionExpressionStubImpl.serialize(JSDefinitionExpressionStubImpl.java:72)
	at com.intellij.lang.javascript.psi.JSStubElementType.serialize(JSStubElementType.java:52)
	at com.intellij.lang.javascript.psi.JSStubElementType.serialize(JSStubElementType.java:18)
	at com.intellij.psi.stubs.StubTreeSerializerBase.serializeStub(StubTreeSerializerBase.java:251)
	at com.intellij.psi.stubs.StubTreeSerializerBase.serializeStubList(StubTreeSerializerBase.java:239)
	at com.intellij.psi.stubs.StubTreeSerializerBase.serializeRoot(StubTreeSerializerBase.java:166)
	at com.intellij.psi.stubs.StubTreeSerializerBase.serialize(StubTreeSerializerBase.java:78)
	at com.intellij.psi.stubs.SerializationManagerImpl.serialize(SerializationManagerImpl.java:182)
	at com.intellij.psi.stubs.SerializedStubTree.serializeStub(SerializedStubTree.java:56)
	at com.intellij.psi.stubs.StubUpdatingIndex$1.computeValue(StubUpdatingIndex.java:193)
	at com.intellij.psi.stubs.StubUpdatingIndex$1.computeValue(StubUpdatingIndex.java:156)
	at com.intellij.psi.stubs.StubUpdatingIndex$1.computeValue(StubUpdatingIndex.java:123)
	at com.intellij.util.indexing.SingleEntryIndexer.map(SingleEntryIndexer.java:30)
	at com.intellij.util.indexing.SingleEntryIndexer.map(SingleEntryIndexer.java:19)
	at com.intellij.util.indexing.impl.MapReduceIndex.mapByIndexer(MapReduceIndex.java:328)
	at com.intellij.util.indexing.impl.MapReduceIndex.mapInput(MapReduceIndex.java:318)
	at com.intellij.util.indexing.impl.storage.VfsAwareMapReduceIndex.mapInput(VfsAwareMapReduceIndex.java:182)
	at com.intellij.util.indexing.impl.storage.VfsAwareMapReduceIndex.mapInput(VfsAwareMapReduceIndex.java:47)
	at com.intellij.util.indexing.impl.MapReduceIndex.mapInputAndPrepareUpdate(MapReduceIndex.java:263)
	at com.intellij.psi.stubs.StubUpdatingIndexStorage.mapInputAndPrepareUpdate(StubUpdatingIndexStorage.java:60)
	at com.intellij.psi.stubs.StubUpdatingIndexStorage.mapInputAndPrepareUpdate(StubUpdatingIndexStorage.java:19)
	at com.intellij.indexing.composite.CompositeInvertedIndexBase.updateBaseIndex(CompositeInvertedIndexBase.java:232)
	at com.intellij.indexing.composite.CompositeInvertedIndexBase.mapInputAndPrepareUpdate(CompositeInvertedIndexBase.java:55)
	at com.intellij.indexing.composite.CompositeInvertedIndexBase.mapInputAndPrepareUpdate(CompositeInvertedIndexBase.java:26)
	at com.intellij.util.indexing.FileBasedIndexImpl.updateSingleIndex(FileBasedIndexImpl.java:1520)
	at com.intellij.util.indexing.FileBasedIndexImpl.lambda$doIndexFileContent$23(FileBasedIndexImpl.java:1394)
	at com.intellij.openapi.fileTypes.impl.FileTypeManagerImpl.freezeFileTypeTemporarilyIn(FileTypeManagerImpl.java:648)
	at com.intellij.util.indexing.FileBasedIndexImpl.doIndexFileContent(FileBasedIndexImpl.java:1361)
	at com.intellij.util.indexing.FileBasedIndexImpl.indexFileContent(FileBasedIndexImpl.java:1315)
	at com.intellij.util.indexing.FileBasedIndexImpl.processRefreshedFile(FileBasedIndexImpl.java:1280)
	at com.intellij.util.indexing.FileBasedIndexImpl$VirtualFileUpdateTask.doProcess(FileBasedIndexImpl.java:1621)
	at com.intellij.util.indexing.FileBasedIndexImpl$VirtualFileUpdateTask.doProcess(FileBasedIndexImpl.java:1618)
	at com.intellij.util.indexing.UpdateTask.process(UpdateTask.java:63)
	at com.intellij.util.indexing.UpdateTask.processAll(UpdateTask.java:32)
	at com.intellij.util.indexing.FileBasedIndexImpl.forceUpdate(FileBasedIndexImpl.java:1640)
	at com.intellij.util.indexing.FileBasedIndexImpl.ensureUpToDate(FileBasedIndexImpl.java:792)
	at com.intellij.psi.stubs.StubIndexImpl.processAllKeys(StubIndexImpl.java:429)
	at com.intellij.psi.stubs.StubIndex.processAllKeys(StubIndex.java:68)
	at com.intellij.psi.stubs.StubIndexImpl.getAllKeys(StubIndexImpl.java:417)
	at org.elm.lang.core.stubs.index.ElmNamedElementIndex$Companion.getAllNames(ElmNamedElementIndex.kt:41)
	at org.elm.ide.navigation.ElmGoToSymbolContributor.getNames(ElmGoToSymbolContributor.kt:15)
	at com.intellij.ide.util.gotoByName.ContributorsBasedGotoByModel.processContributorNames(ContributorsBasedGotoByModel.java:134)
	at com.intellij.ide.util.gotoByName.ContributorsBasedGotoByModel$1.processInReadAction(ContributorsBasedGotoByModel.java:85)
	at com.intellij.ide.util.gotoByName.ContributorsBasedGotoByModel$1.processInReadAction(ContributorsBasedGotoByModel.java:79)
	at com.intellij.openapi.application.ReadActionProcessor.lambda$process$0(ReadActionProcessor.java:11)
	at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:854)
	at com.intellij.openapi.application.ReadAction.compute(ReadAction.java:61)
	at com.intellij.openapi.application.ReadActionProcessor.process(ReadActionProcessor.java:11)
	at com.intellij.concurrency.JobLauncherImpl.lambda$invokeConcurrentlyUnderProgress$0(JobLauncherImpl.java:50)
	at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:825)
	at com.intellij.concurrency.JobLauncherImpl.lambda$invokeConcurrentlyUnderProgress$1(JobLauncherImpl.java:50)
	at com.intellij.concurrency.ApplierCompleter.execAndForkSubTasks(ApplierCompleter.java:136)
	at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1078)
	at com.intellij.concurrency.ApplierCompleter.lambda$wrapInReadActionAndIndicator$1(ApplierCompleter.java:92)
	at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:705)
	at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:647)
	at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:63)
	at com.intellij.concurrency.ApplierCompleter.wrapInReadActionAndIndicator(ApplierCompleter.java:104)
	at com.intellij.concurrency.ApplierCompleter.compute(ApplierCompleter.java:86)
	at java.base/java.util.concurrent.CountedCompleter.exec(CountedCompleter.java:746)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)