pipelines: problem when deploying kubeflow 0.4.0

I am trying to deploy 0.4.0 in my cluster and pipeline seems not deployed correctly. my setup: deploying in EKS, with kssonet==0.13.0

list of my pods:

ml-pipeline-scheduledworkflow-5f47df7d54-4s45c           1/1       Running            0          4d
ml-pipeline-persistenceagent-5b7d65db44-2w8pg            0/1       CrashLoopBackOff   1137       4d
ml-pipelines-load-samples-dxg59                          0/1       Error              0          4d
ml-pipeline-ui-784bc748c4-dj8qh                          1/1       Running            0          4d

log from load-samples:

goroutine 1 [running]:
github.com/kubeflow/pipelines/vendor/github.com/golang/glog.stacks(0xc0003f5d00, 0xc000560000, 0x68, 0x9b)
	/go/src/github.com/kubeflow/pipelines/vendor/github.com/golang/glog/glog.go:769 +0xd4
github.com/kubeflow/pipelines/vendor/github.com/golang/glog.(*loggingT).output(0x263bee0, 0xc000000003, 0xc00001e790, 0x239a6b6, 0x8, 0x128, 0x0)
	/go/src/github.com/kubeflow/pipelines/vendor/github.com/golang/glog/glog.go:720 +0x329
github.com/kubeflow/pipelines/vendor/github.com/golang/glog.(*loggingT).printf(0x263bee0, 0x3, 0x15d6e4d, 0x2, 0xc000145a70, 0x1, 0x1)
	/go/src/github.com/kubeflow/pipelines/vendor/github.com/golang/glog/glog.go:655 +0x14b
github.com/kubeflow/pipelines/vendor/github.com/golang/glog.Fatalf(0x15d6e4d, 0x2, 0xc000145a70, 0x1, 0x1)
	/go/src/github.com/kubeflow/pipelines/vendor/github.com/golang/glog/glog.go:1148 +0x67
github.com/kubeflow/pipelines/backend/src/common/util.TerminateIfError(0x17814e0, 0xc0005e4050)
	/go/src/github.com/kubeflow/pipelines/backend/src/common/util/error.go:296 +0x79
main.initMysql(0xc0003486c8, 0x5, 0x53d1ac1000, 0x0, 0x0)
	/go/src/github.com/kubeflow/pipelines/backend/src/apiserver/client_manager.go:204 +0x2c6
main.initDBClient(0x53d1ac1000, 0x15)
	/go/src/github.com/kubeflow/pipelines/backend/src/apiserver/client_manager.go:137 +0x54c
main.(*ClientManager).init(0xc000145d50)
	/go/src/github.com/kubeflow/pipelines/backend/src/apiserver/client_manager.go:103 +0x80
main.newClientManager(0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...)
	/go/src/github.com/kubeflow/pipelines/backend/src/apiserver/client_manager.go:242 +0x90
main.main()
	/go/src/github.com/kubeflow/pipelines/backend/src/apiserver/main.go:53 +0x88```

and when I open the UI:
I see `Error: failed to retrieve list of pipelines. Click Details for more information.`