i too had the same problem here looking at certain stuff, i found out it was my firewall stopping it , also an ad blocker was doing the same thing it was letting most of the stuff through but not all of it , i re adusted the software and now its fine .
(ocultar) Si deseas jugar una partida contra un adversario de nivel similar, puedes definir en tu invitación de nueva partida un rango BKR apropiado a tu interés. En tal caso, nadie con un BKR fuera de dicho rango podrá ver o aceptar la invitación. (Katechka) (mostrar todos los consejos)