client updates when opening, but when log in 1 error, at the second attempt i am stuck.

i cant log in to the game. when i open the client it starts downloading a 50mbg file. when i try to log in, its says "there is a errorand if it occurs mutiple times contact riot support. when i try to log in again after 5 seconds ts stuck on authenticating.... i have run all options of hextex repair tool. i RESET my pc. game reinstall. dns fixt. but noting works.. anyone any solutions??

ps.sorry for my english, im dutch.