Just try to check the seutp first by running sudo gvm-check-setup to see if is there any error or not.
Also try to watch this video, it may help you OpenVas Refuse connection and for complete instructions you may need to visit this website OpenVas setup and configurations
I hope you are well. Thank you for your warning, however can you please tell me on what basis you tell me not to promote something here on the forum? Can you show me where this is written in the Guideline or Terms of Service of the Greenbone forum? I don’t want to go against the rules set forth by the Greenbone team, I have read the guidelies and Terms of Service and find nothing to support your comment, however the content I shared is about the Greenbone team’s tools. Please don’t misunderstand me, I don’t want to argue I just want to be clear and make sure I am acting according to the rules established on the Forum. Thank you in advance