My Microsoft account doesn't work on my Wifi!!!

V 1.16.1 : Minecraft P.E
 
My Microsoft account does not work on my Wifi. When I put my Wifi on, it loading, loading and when it ends, happen a wrong. But, when I put another wifi or even my 3G, my account works normally. What should I do? 
 
(I'm not a English speaker, apologize me for my bad vocabulary)

(Please, help me! I just want to play with my friends......and wifi my WIFI!!!)