1.This error message may be due to an incorrect or invalid URL in one of the URL fields within CSA/NSA. In this case, the URL can appear to be in the correct format, however part of the FQDN is incorrect.
For example, the URL showing in CSA/NSA is:
http://server1.example.com
The URL needs to be corrected to:
http://server1.example.com
2. If the domain is correct but cannot be resolved - update (work with your IT team to update) to add the IP and the hostname to the the etc/hosts file
3. This could be caused by "http://" in HTTPS field in CSA. All https fields must be set to https.