Problem installing WSUS3

in Off-Topic
We has an old sus server that i needed to update, so i replaced the hard drives installed os, iis etc all updates and also installed wsus3, i changed the servers name and also made the changes to the GPO to reflect the new wsus server name, but could not get the clients to connect for ages, i eventually found the issue but uninstalled wsus3 and re-installed to start afresh, but now i cannot connect to the proxy server whereby i could before. Please see attached error pic.
Can anyone help please?
Can anyone help please?
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WGU Networks BS in IT - Design & Managment (2nd Term)
Transfer: BAC1,BBC1,CLC1,LAE1,INC1,LAT1,AXV1,TTV1,LUT1,INT1,SSC1,SST1,TNV1,QLT1,ABV1,AHV1,AIV1,BHV1,BIV1
Required Courses: EWB2, WFV1, BOV1, ORC1, LET1, GAC1, HHT1, TSV1, IWC1, IWT1, MGC1, TPV1, TWA1, CPW3.
Key: Completed, WIP, Still to come
Using the WinHTTP Proxy Configuration Utility
You can reset your settings, force it to use whatever is working for IE, etc.
Are there any other applications installed on this server? There are applications that have known issues working with Windows Update... I remember specifically Project Server being one because it modifies the WinHTTP configuration.
Recent: 11/2019 - RHCSA (RHEL 7); 2/2019 - Updated VCP to 6.5 (just a few days before VMware discontinued the re-cert policy...)
Working on: RHCE/Ansible
Future: Probably continued Red Hat Immersion, Possibly VCAP Design, or maybe a completely different path. Depends on job demands...
Cool, thanks for sharing the solution with us.