You need to use a reference selector widget for using data via association.
Take a look at this post → https://forum.mendix.com/link/questions/112868
Additionally, I’ve seen at least a couple other people having the same problem. It is better to also let Mendix support know that this issue is happening in Studio. This might help other people later on once they fix it!
Hope this helps
Thank you, I understood that this can be done using ‘Studio Pro’ only.
Instead of ‘Drop-down’ in the ‘Studio’, I used ‘Reference Selector’ widget in ‘Studio Pro’. Which works the same way as Drop-down.