I am upgrading an HX240 cluster from 2.6(1a) to 2.6(1d), and the upgrade has completed successfully on 2 of the 4 nodes. One node fails after the bootstrap, VIB upgrade and reboot steps with the above error. I have re-attempted the upgrade multiple times to no avail. All nodes were initially installed at the same time, and there should not be any difference in the credentials between nodes. Is there any way to confirm what credentials it's trying to use, and whether the credentials match between this node and others?
Try referring the troubleshooting guide below in the link provided.