Champion error select

I get into champ select and go to pick my champ but the button is greyedout. Then last second a notification pops up saying i had an error in picking the champ. I end up losing more lp and getting a queue dodge timer for nothing. this is the second related champ slect error ive had in the week and no riot employee has done anything about it. Im tired of getting my lp taken away for it not even being my fault. I have perfectly good internet, but yet this is the only game that seems to be having problems. For goodness sake fix your game or atleast respond for once!!!