Match history not loading and missions not registering

Greetings. I would like to bring to your attention a matter of utmost importance. Not long ago, I had triumphed in a splendid match of both ARAM and the 5v5 draft pick, yet the daunting tasks under the missions banner still claim I have yet to fulfill the necessary requirements to complete both tasks. When I sought to examine my match history in order to ensure my wins were loading, I was astonished to find the absence of any of my past battles. I find still myself staring into the endless spiral of that blue, half doughnut shaped symbol whenever I attempt to gaze upon my past victories and defeats under the Match History banner. My dearest Riot, do you believe tis possible to repair this issue forthwith? It would be immensely appreciated by both myself and my peers. Good day.