The server encountered an unexpected condition which prevented it from fulfilling the request

Hello,

I have this error that occurs when i try to deploy the bdm. The error below doesn't give much information on what is the reason. In addition to that, when i open the ui designer, i can't find any model to use!

Could you help me identify the source of this problem?

'!ENTRY org.bonitasoft.studio.common 4 0 2020-07-20 16:54:23.392

!MESSAGE An error occured while publishing the BDM into Data Repository service
!STACK 0
Internal Server Error (500) - The server encountered an unexpected condition which prevented it from fulfilling the request
at org.restlet.resource.ClientResource.doError(ClientResource.java:590)
at org.restlet.resource.ClientResource.handleInbound(ClientResource.java:1153)
at org.restlet.resource.ClientResource.handle(ClientResource.java:1048)
at org.restlet.resource.ClientResource.handle(ClientResource.java:1023)
at org.restlet.resource.ClientResource.post(ClientResource.java:1485)
at org.bonitasoft.studio.designer.core.PostBDMEventHandler.execute(PostBDMEventHandler.java:54)
at org.bonitasoft.studio.designer.core.PostBDMEventHandler.handleEvent(PostBDMEventHandler.java:42)
at org.eclipse.e4.ui.services.internal.events.UIEventHandler.lambda$0(UIEventHandler.java:38)
at org.eclipse.ui.internal.PendingSyncExec.run(PendingSyncExec.java:68)
at org.eclipse.ui.internal.UILockListener.doPendingWork(UILockListener.java:171)
at org.eclipse.ui.internal.UISynchronizer.lambda$0(UISynchronizer.java:152)
at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:40)
at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:185)
at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4910)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:4432)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$5.run(PartRenderingEngine.java:1160)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1049)
at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:155)
at org.eclipse.ui.internal.Workbench.lambda$3(Workbench.java:660)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:338)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:559)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:154)
at org.bonitasoft.studio.application.BonitaStudioApplication.createAndRunWorkbench(BonitaStudioApplication.java:137)
at org.bonitasoft.studio.application.BonitaStudioApplication.start(BonitaStudioApplication.java:99)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:137)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:107)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594)
at org.eclipse.equinox.launcher.Main.run(Main.java:1465)
at org.eclipse.equinox.launcher.Main.main(Main.java:1438)