Loading mbeddr.c plugins from libraries throws UnsupportedOperationExcetion

[arimer]

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When I configure my project in a way that it loads the mbeddr.c plugins (mbeddr.build=1.2.21178.caed2b7) from libraries I receive the following exception during project startup.

 mps.smodel.EDTExecutorInternal - run in EDT failure
java.lang.UnsupportedOperationException
	at jetbrains.mps.extapi.model.SModelBase.addRootNode(SModelBase.java:230)
	at jetbrains.mps.lang.smodel.generator.smodelAdapter.SModelOperations.addRootNode(SModelOperations.java:124)
	at com.mbddr.core.buildconfig.pluginSolution.plugin.PluginSolution_ProjectPlugin$1$1.run(PluginSolution_ProjectPlugin.java:57)
	at jetbrains.mps.smodel.WorkbenchModelAccess.executeCommand(WorkbenchModelAccess.java:266)
	at jetbrains.mps.smodel.ProjectModelAccess2.executeCommand(ProjectModelAccess2.java:35)
	at com.mbddr.core.buildconfig.pluginSolution.plugin.PluginSolution_ProjectPlugin$1.getModel(PluginSolution_ProjectPlugin.java:48)
	at com.mbeddr.mpsutil.spreferences.runtime.SPreferencesPage$1.run(SPreferencesPage.java:38)
	at jetbrains.mps.smodel.WorkbenchModelAccess$UndoContextSetup.run(WorkbenchModelAccess.java:360)
	at jetbrains.mps.smodel.ActionDispatcher.dispatch(ActionDispatcher.java:84)
	at jetbrains.mps.smodel.ActionDispatcher.lambda$wrap$0(ActionDispatcher.java:100)
	at jetbrains.mps.smodel.ActionDispatcher.dispatch(ActionDispatcher.java:84)
	at jetbrains.mps.smodel.ActionDispatcher.lambda$wrap$0(ActionDispatcher.java:100)
	at jetbrains.mps.smodel.LockRunnable.run(LockRunnable.java:60)
	at jetbrains.mps.smodel.TryRunPlatformWriteHelper.lambda$tryWrite$2(TryRunPlatformWriteHelper.java:122)
	at com.intellij.openapi.application.impl.ApplicationImpl.runWriteAction(ApplicationImpl.java:1057)
	at jetbrains.mps.smodel.TryRunPlatformWriteHelper.runWrite(TryRunPlatformWriteHelper.java:103)
	at jetbrains.mps.smodel.TryRunPlatformWriteHelper.tryWrite(TryRunPlatformWriteHelper.java:120)
	at jetbrains.mps.smodel.WorkbenchModelAccess.lambda$tryWriteInCommand$4(WorkbenchModelAccess.java:226)
	at jetbrains.mps.util.ComputeRunnable.compute(ComputeRunnable.java:32)
	at jetbrains.mps.util.AbstractComputeRunnable.run(AbstractComputeRunnable.java:27)
	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:220)
	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:178)
	at com.intellij.openapi.command.impl.CoreCommandProcessor.executeCommand(CoreCommandProcessor.java:168)
	at jetbrains.mps.smodel.WorkbenchModelAccess.tryWriteInCommand(WorkbenchModelAccess.java:243)
	at jetbrains.mps.smodel.WorkbenchModelAccess.lambda$runCommandInEDT_$3(WorkbenchModelAccess.java:157)
	at jetbrains.mps.smodel.EDTExecutor$1.tryRun(EDTExecutor.java:60)
	at jetbrains.mps.smodel.EDTExecutorInternal.tryToRunTopTask(EDTExecutorInternal.java:231)
	at jetbrains.mps.smodel.EDTExecutorInternal.flushNTasks(EDTExecutorInternal.java:194)
	at jetbrains.mps.smodel.EDTExecutorInternal.doFlush(EDTExecutorInternal.java:168)
	at jetbrains.mps.smodel.EDTExecutorInternal.flushTasksQueue(EDTExecutorInternal.java:156)
	at jetbrains.mps.smodel.EDTExecutorInternal.lambda$guaranteeWriteSafetyViaHack$1(EDTExecutorInternal.java:147)
	at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:315)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:435)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:419)
	at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:403)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:762)
	at java.awt.EventQueue.access$500(EventQueue.java:98)
	at java.awt.EventQueue$3.run(EventQueue.java:715)
	at java.awt.EventQueue$3.run(EventQueue.java:709)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:732)
	at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:719)
	at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:668)
	at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:363)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)