Client Saying 'Offline' falsely; Connection Issues???

I have been encountering the issue of getting to the new client log in screen and it saying this exact message in red text: 'We're unable to log you in because you may be offline'. The only issue is I have tried several times to connect and reconnect to my internet; it is unmistakable that I am connected to my wireless connection properly, as I am browsing without issue. Riot Personnel and fellow summoners; please respond; I have no idea what to do in this situation besides trying to reinstall the client completely, which may take a great deal of time. But in spite of that, I am willing to try any sensible ideas as to fixing this issue.
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