Unable to pick my champ in ranked champ select

So today im going to ranked with my bois .We're in ban phase and i ban renekton at the very last second. Im last pick and when i want to pick camille it says "There was an error selecting your champion",while i had the renekton splashart in the background.WTF riot.How is this acceptable?I'd lose my sht if this happened in my promos.