Please, describe as much as possible about of what the bug is. It will help to solve this issue faster.
StackTrace from IDE
java.lang.Throwable: Slow operations are prohibited on EDT. See SlowOperations.assertSlowOperationsAreAllowed javadoc.
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:376)
at com.intellij.util.SlowOperations.assertSlowOperationsAreAllowed(SlowOperations.java:101)
at com.intellij.openapi.vfs.newvfs.persistent.FSRecordsImpl.update(FSRecordsImpl.java:735)
at com.intellij.openapi.vfs.newvfs.persistent.PersistentFSImpl.findChildInfo(PersistentFSImpl.java:654)
at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findInPersistence(VirtualDirectoryImpl.java:155)
at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.doFindChild(VirtualDirectoryImpl.java:137)
at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:83)
at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:532)
at com.intellij.openapi.vfs.newvfs.impl.VirtualDirectoryImpl.findChild(VirtualDirectoryImpl.java:51)
at com.atwix.magento.project.configurator.validator.MagentoInstallationValidator.isValid(MagentoInstallationValidator.java:40)
at com.atwix.magento.project.configurator.AutoConfigurationService.execute$lambda$0(AutoConfigurationService.kt:47)
at com.intellij.openapi.project.DumbServiceImpl.smartInvokeLater$lambda$16(DumbServiceImpl.kt:496)
at com.intellij.openapi.application.TransactionGuardImpl.runWithWritingAllowed(TransactionGuardImpl.java:209)
at com.intellij.openapi.application.TransactionGuardImpl.access$100(TransactionGuardImpl.java:22)
at com.intellij.openapi.application.TransactionGuardImpl$1.run(TransactionGuardImpl.java:191)
at com.intellij.openapi.application.impl.RwLockHolder.runIntendedWriteActionOnCurrentThread(RwLockHolder.kt:204)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:823)
at com.intellij.openapi.application.impl.ApplicationImpl$2.run(ApplicationImpl.java:420)
at com.intellij.openapi.application.impl.RwLockHolder.runWithEnabledImplicitRead(RwLockHolder.kt:138)
at com.intellij.openapi.application.impl.RwLockHolder.runWithImplicitRead(RwLockHolder.kt:129)
at com.intellij.openapi.application.impl.ApplicationImpl.runWithImplicitRead(ApplicationImpl.java:1145)
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:703)
at com.intellij.ide.IdeEventQueue._dispatchEvent$lambda$12(IdeEventQueue.kt:596)
at com.intellij.openapi.application.impl.RwLockHolder.runWithoutImplicitRead(RwLockHolder.kt:105)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.kt:596)
at com.intellij.ide.IdeEventQueue.access$_dispatchEvent(IdeEventQueue.kt:77)
at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:362)
at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1$1.compute(IdeEventQueue.kt:361)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:843)
at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:361)
at com.intellij.ide.IdeEventQueue$dispatchEvent$processEventRunnable$1$1.invoke(IdeEventQueue.kt:356)
at com.intellij.ide.IdeEventQueueKt.performActivity$lambda$1(IdeEventQueue.kt:1026)
at com.intellij.openapi.application.TransactionGuardImpl.performActivity(TransactionGuardImpl.java:106)
at com.intellij.ide.IdeEventQueueKt.performActivity(IdeEventQueue.kt:1026)
at com.intellij.ide.IdeEventQueue.dispatchEvent$lambda$7(IdeEventQueue.kt:356)
at com.intellij.openapi.application.impl.RwLockHolder.runIntendedWriteActionOnCurrentThread(RwLockHolder.kt:209)
at com.intellij.openapi.application.impl.ApplicationImpl.runIntendedWriteActionOnCurrentThread(ApplicationImpl.java:823)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.kt:398)
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)
To Reproduce (*)
Go to '...'
Click on '....'
Scroll down to '....'
See error
Screenshots
If applicable, add screenshots to help explain your problem.
Describe the bug (*)
Please, describe as much as possible about of what the bug is. It will help to solve this issue faster.
StackTrace from IDE
To Reproduce (*)
Screenshots
If applicable, add screenshots to help explain your problem.
System information: