Unable to connect my account on Mac Pro

[AysegulBy]

Hi! Recently I changed my computer with Mac Pro  and before that I was using windows based system at my old computer. My account and app which works perfectly on my windows based computer now doesn't work. I am trying to open my old account and the app keep saying check your network connection even though there is nothing wrong about my internet. I tried to delete and redownload the app but it didn't work either. Any suggestions???

[energiahealth]

I am also having issues downloading on my MacBook air