Skype not sending or receiving calls

I just purchased a computer with Win 10 Home edition earlier this February, 2018.  When I utilize the Skype App I do not receiving incoming call notifications and any attempt to call out are not received by my Contacts.  Notification for incoming calls is enabled.  I was able to join a group call already in progress, but the only notifications I get are that I missed a call.

Thank you,

-Nathan