Was just running this last night and it was working, try this.
After you have activated the trainer click on the city you wish to boost, with the mouse pointer over the city activate the cheat, once you hear activated deselect the city, click on the ground or something. after it deactivates click on the city again.
The easiest way to tell if it is working is to use it on round one before you do anything else, you will see the smithing hammer on the city indicating that you can build, when you activate the cheat it will go away, after that deselect the city, when it deactivates and you click back on the city the hammer will return.
As far as I am aware as long as your game is up to date we have the same version even though I have all the DLCs, you just can't access those features but it should be exactly the same build as long as your game is up to date. Hope it works!
have you disable all AV and firewalls? Anything that could be preventing the trainer from working as intended? I know every once in a while I run into a option or two that has trouble and this is almost always the culprit, even if the trainer loads some times AV, Windows Defender, firewalls, can prevent them from working as intended.
Any mods installed?