Ca.crt Vault CSI Provider fallen

while using Vault CSI Provider, im getting this error in the pod :
Warning FailedMount 80s (x12 over 9m34s) kubelet MountVolume.SetUp failed for volume "vault-db-creds" : rpc error: code = Unknown desc = failed to mount secrets store objects for pod demo-vault-k8s/app-8f866977c-gpbzh, err: rpc error: code = Unknown desc = error making mount request: Error loading CA File: open /vault/tls/ca.crt: no such file or directory

I’m following the »Vault CSI Provider Examples

any idea how to solve this issue