The app is not working anymore – FAX from iPhone - Send Fax App Review

It used to work well. However, now when opening the fax app and trying to send a fax it either says “connect to the internet to send fax” or “server is unavailable, please try again later”. It’s been like that for the past few days. I have restarted iPhone and reloaded the app several times but to no avail.
Review by Privateering on FAX from iPhone - Send Fax App.