Sounds like you have installed the client on a PC and using it there too?
You do not do this!
Contact the support team for some help.
I noticed your reply to Orlando, could you let me know if I am interpreting it correctly, are you saying that you cannot use pfclient on the same computer you are uploading with?
I am having problems with my setup in that when I first started I was uploading and didn't realise it but I couldn't get anything on pfclient, then my pi decided to die and I have replaced it with a new one but then your site wouldn't accept it because it was on the wrong IP address.
I have now managed to get the new pi accepted and registered on the new IP address but I still cannot get anything on pfclient and it is flat lining on all the other checks.
I have tried pfclient on two computers, a pi 3 B+ running stretch (this is the one I am uploading with) and a Windows 10 machine, neither are showing any signs of uploading and as, as far as I can see, pfclient is the only source available to check I must assume that I am not uploading.
Could you please help or at least point me in the right direction.