That's highly unlikely:
https://browserhow.com/how-to-save-and-manage-passwords-on-opera-browser/
If you go to Setting on Opera and select 'Learn More' on the Clear browser data tab and go to to Security and Privacy - that is what it says.
I allow Opera to update - so unless the Help on Opera is incorrect all I can assume is that it clearing browser data also clears password and log-in data as I have indicated.
@rbz5416 You don't need a password to access the hub manager, only if you need advanced options.
@Bobg1 As @imjolly says, the hub manager is HTTP not HTTPS
I still think its worth resetting your network adaptor. Go to Control Panel> Network and Internet > Network Connections. Select your Network adaptor and disable then enable.
Will a disable / re-enable just load previous setting, rather than reboot from scratch and thus create new settings??
It will flush any dynamic settings and allow the NIC to obtain correct settings.
Did your previous hub have a different IP addressing scheme?
Sadly no change, still to access. Disabled /Enabled via Device Manager / Network adapter.
I am not aware the previous hub had a different IP addressing scheme. It automatically set itself up when I connected it without any issues.