This has been doing my head in, but I have finally found the solution
If you have been like myself and going to This Website to get the code (using an iframe)
then going to your Spotify Community Page > My Settings > Personal Profile > Personal Information, then pasting into > Signature and clicking "Save" anxiously awaiting that moment for that click to unvail your "follow button" in all its glory....
forget it! It doesn't work.
For the correct code Follow the information in this Guide then give yourself a pat on the back when you click the save button and it finally accepts the code which produces the desired affect!
I sure did