When you initially download the kiosk app installer, you may receive a warning and this differs if you are downloading via Edge, or via Chrome. Your IT department may also restrict certain files, and this will be handled on a case by case basis.
Downloading via Edge
When the download has finished, you may see this warning, you need to click on the three dots to the right when you hover over the tile, and click “Keep”
Then on the following dialogue, click “Show more” then click “Keep Anyway”.
Downloading via Chrome
When the download has finished and you go to open the file, you may see this warning, you need to click “More Info” then “Run Anyway”