1. Open Turbo Lister.
2. On the main Item Inventory page, press "CTRL + ALT + SHIFT + R" on
your keyboard (all at the same time).
3. This should bring up a small dialog box. Click "OK."
4. Click "Tools," then "Check for Program Updates." This will download
the latest category, attribute, and pre-filled item information.
5. Once this update is complete, review your items to ensure that the
correct information has been entered (this means you'll need to open the
item, and edit Item specifics, making sure the correct entries are
there, then save).
Then run an update on their TL2 and check if they are able to proceed
further. This should solve your problem.