adding a second vcenter

Hello,

Getting the following error when adding a second vcenter instance:

ERROR {} [SessionWrapper] Error occurred when constructing host session for: Administrator@VSPHERE.LOCAL@vcenter.oxnardpd.org SDK

java.lang.RuntimeException: (vim.fault.InvalidLogin) {

   faultCause = null,

   faultMessage = null

}

Any help is appreciated, Thank you

version:7.3.0