This will happen if your internet or network connection is not completely unplugged or disabled. Just like it says in the readme.
[Edited by PWizard, 3/7/2017 8:19:10 PM]
Thanks we will try and check it when we have time. Been a very long two days working on this non-stop. We're not even sure that saves are shareable at this point. Again, your best solution might just be deleting that character and starting a new one.
We recommend putting both Steam and UPLAY in offline mode to begin with, but this in itself will not allow the trainer to work. You can disable whatever network adapter you are using through the Network and Sharing center. Unplug if hardwired or Airplane mode would probably work as well.