VxRail Initialization Issue

Hello, 

 we are trying to build our P670F 4 Nodes Cluster, the validation gives some error one of them disk issue, the validation pages closed by mistake when we login again to VxRail manager initial wizard it starts from welcome first page, when we fill again all fields trying to re-validate it gives error, wait another process is running (the previous validation), my question 

1- how to cancel the old process and restart the wizard 

2- can we shutdown one host to troubleshoot the hardware issue and reboot it while this wizard is open ?

Thank you