Trying out this map, I believe that the linked addon Star Wars Weapons (Clone Hands) conflicts with the Star Wars Weapons addon it's copied from.

If you already have the original Star Wars Weapons (like I did as a requirement for other addons I have), the droid training room still seems to work fine without installing the "Clone Hands" version.

It seems like having both might cause a conflict, so maybe you should pick one or the other (the non clone hands original seems to be required by more Star Wars addons, so I'd recommend it if you're planning to go through more addons).

Feel free in comments to discuss your results, it's not exactly something I've heavily tested. This seems to also apply to the standalone smaller version of this map.