I WANNA PLAY LOL BUT THE GAME NOT ALLOWS ME TO LOG IN. There was an unexpexted error with the login

That was a normal day... The same day that it was yesterday. The incredulous boy, leleyo4 woke up from his bed and powered up his 2k$ gaming laptop. He opens his favorite game which gives him everyday a lot of emotions: League of Legends. He entered his summunor name, then, his password, and finally presses the "enter" button. The client took time to pop up. Here, our guy, leleyo4 felt that something wasn't going like the other days. When the client window pop up, he thaugh that he was dreaming: that was a black screen. Then, a pop up poped up. leleyo4 poped up from his chair, suprise by this happening. It was ritten: "THERE WAS AN UNEXPECTED ERROR WITH THE LOGIN SESSION. PLEASE TRY AGAIN". leleyo4 thaught that his 2k$ laptop had a bug and decided to relaunch his computer. But when he opens up again the LoL client, the same message pop in his face up: ""THERE WAS AN UNEXPECTED ERROR WITH THE LOGIN SESSION. PLEASE TRY AGAIN". leleyo4 guessed that it was a bug from the game and search for somebody who had the same issue. He found someones. There was saying "click on X before the message pops up, sign out and use a PBE acount to log in". leleyo4 tryed but that was a failure. Someother was saying " delete a line of code in lol client settings file". This methode did not worked too for him. Somelasts told him to do a full repair with hextech repair tool. That obviusly did not work for him.The last solution letted to him was to uninstall and reinstall the hole game. He calms his heart down by breathing deep and press the button delete. After that all the emotions passed through his soul, decides to push the button "reinstall". He saw all the files which constituating his favorite game being downloading. His heart was beatting fast. When he successed to loged in after a long wating he could not stop smiling. He closes the game and reopen it. This was a big mistake from him. The client became a dark screen which feels to him abbled to eat him. Soudainly: "There was an unexpected error with the login session. Please try again". He get up from his chair. The pop up message scared him. He had thet same issue after reinstalling the game. He does not understand. He does not understand because he understand that the issue was not comming from him but from the game itselves: he could not do anything to fix it and feels for the fist time in his life the "shame" and his "incapacity". Since this happening happend, he sees nightmare of pops up poping up toward his face and of the: "THERE WAS AN UNEXPECTED ERROR WITH THE LOGIN SESSION. PLEASE TRY AGAIN". THE POOR LELEYO4 NEEDS HELP!! GIVE HIME SOME AND YOU WILL KNOW THE FOLLOWING OF THE STORY!