You need to have your system language set to english US in the formats tab of the Region and language settings. This is known as SPR# 624114 Custom Property list driven by Excel table is empty in Task Pane in non-English language, although Property Tab builder shows listbox OK
Hi - It worked. Problem is resolved!
Welcome to the forum.
If they are working on a few of the users try using the copy settings wizard from the machine that is working and copy those settings to the one that isn't and see of that works.