Solution
To solve this issue we have can try:
1- Run LabVIEW as Administrator. May LabVIEW has not enough permits, and this block the Quick drop to drop the functions on LabVIEW. You can do it like the next picture.
2- Possibly there is some component corrupted on LabVIEW, we can try to make a
Force Reinstall of LabVIEW.