Very frustrating bug

Hello! Recently, I often get an error saying "Unable to connect to the server. Please try your internet connection and try to reconnect to your game." even if my internet connection is stable. I tried to left the game and then enter again, but when I click on the "Reconnect" button I get the League of Legends logo and then it starts a completely black page and it gives me that error. I would ask for this bug to be fixed because I get Leavebuster and it is not very nice to wait a long time to play again. Thank you very much to have a good day!