Error during publish

sorry if my english so bad,
when i following instruction from “https://www.youtube.com/watch?v=mB-a3KERcCg”, connect bonita to mySQL,
i have An error occured during synchronization

org.bonitasoft.studio.actors.operation.PublishOrganizationOperation.run(PublishOrganizationOperation.java:105)
org.bonitasoft.studio.actors.ui.handler.InstallOrganizationHandler.execute(InstallOrganizationHandler.java:65)
org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290)
org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:90)
sun.reflect.GeneratedMethodAccessor22.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
java.lang.reflect.Method.invoke(Unknown Source)
org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:243)
org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:224)
org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:132)
org.eclipse.e4.core.commands.internal.HandlerServiceHandler.execute(HandlerServiceHandler.java:167)
org.eclipse.core.commands.Command.executeWithChecks(Command.java:499)
org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:213)
org.eclipse.ui.internal.handlers.LegacyHandlerService.executeCommand(LegacyHandlerService.java:420)
org.bonitasoft.studio.actors.ui.wizard.SynchronizeOrganizationWizard$1.run(SynchronizeOrganizationWizard.java:114)
org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

please help me