It's annoying and I don't know if it have any effect on SEO or Google ranking and so.
I have a sub-domain multisite, and when I started it I choose to make base url without www based on an advice here that it's the best option, now when I try to press Ctrl+Enter for opening sub-blog I get error, and even if I wrote www manually in front of link it won't load, example:
it won't load if with www:
you have any idea how can I fix that by wordpres or DNS or so? and for a new multisite I'm starting nowadays, what is the best option to choose regarding www for a clean start and good SEO?