Board Game Arena

I have the temporary worker, but I can't seem to use them. I click on it, but it never will go to any available action spot. What am I doing wrong?

The main thing you're doing wrong is using not the best channel to communicate with developer about the problem
If you see something that looks like a bug, report to https://boardgamearena.com/bugs?game=1384

But I don't know if it is a bug or if I am simply making a mistake. I did find one place where the temporary worker would go: the final box to get 1 lira.

You don't have to click on the worker before placing it. If you click on the action that you're wanting to perform, it will automatically put an available worker there (choosing other than the grande worker if possible - clicking on the grande before the action is required if you want to play it earlier than required e.g. if you're planning to retrieve it later).

Other than that, we don't have much to go on unless you post the board number and what move you were at when you couldn't play it anywhere other than the 1 Lira spot. I've never had a problem using the temporary worker for any action.