HTTP2HTTPS not working for ROOT with no URI

Try this:

when HTTP_REQUEST { 
    if { [string tolower [HTTP::uri]] contains "/cash-cards-and-lending/cards/" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/default-client.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/cash-cards-and-lending/cards /american-express-gold-card.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/cash-cards-and-lending/cards /ameriprise-mastercard.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/cash-cards-and-lending/cards/ameriprise-world-elite-mastercard.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/cash-cards-and-lending/cards/ameriprise-world-mastercard.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/cash-cards-and-lending/cards/platinum-card-from-american-express.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/client-login" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/client-login/esignature.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/client-login/logout.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/client-login/message-center/retrieve.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/quicken" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] contains "/default.asp" } { 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } elseif { [string tolower [HTTP::uri]] equals "/" } { 
        log local0. "redirect www.website.com" 
        HTTP::redirect "https://[HTTP::host][HTTP::uri]" 
    } 
}

There were two significant issues:

1. A URI will ALWAYS contain at least the forward slash, so if the user enters no URI in the browser, it will equals "/".

2. You're doing to a [string tolower ] evaluation for "Quicken", but your string is not completely lowercase.