Cloudera client installed failed on all nodes

Hi ,

I took udemy course for Cloudera hadoop administration , I have setup 8 nodes on GCP and now at client installation.
After scanning server from BUI , all servers are scanned but when I go to next screen after putting information of packages and keys to install client at that point client install fails with error authentication failed .
I am stuck at this point almost for last two days. really appreciate help on this.
Sanjeev