i think there is more than one topic with the same problem, ikky (not sure i may have been another user) was who told me to just download the app in other phone (i used my tablet) and that it worked for him. I did it, and emo conected to the wifi in the tablet with no problem, when it happen again i just downloaded the app again in my phone and voilá.
the weird thing is that it says that the app doesnt support 5G but my internet is not 5G.
maybe my internet at home is rubbish (most likely) 
edit: this was the topic I wrote in EMO cannot connect to wifi - Support / EMO Support - LivingAI Forums