Cannot Drag and drop files into folders

[Jonzo123]

Hello, until today, I could easily select 1 or more files (in this case jpeg) and drag them into a sub forlder.  Now I when I try to drag the files into the folder it won't let me drop them there, just hovering above the folder.  This is incredibly frustrating as I've been dragging and dropping files into subfolders for months and now suddenly I can't do it.  I need to do this for work.  

I use both mac and windows (via VM ware)  Until yesterday I could drag and drop on either operating system and now I can't on either.  

Someone please help!

[Kelfischer]

Nope, it's downloaded.  I'm not on the website, I'm running off the downloaded app. 

[Kelfischer]

Nope, it's downloaded.  I'm not on the website, I'm running off the downloaded app. 

Any other ideas?

[Mark]

Im sorry you are incorrect.

On those images you are running from the website.

You have Safari open on the left side and on the right you are in the Finder Photo Library.

Dropbox is not mentioned anywhere (other than in green at the top of the Safari window saying its a secure site). It isnt showing as running (top right next to the icons and time), at the bottom on the dock or in the Finder window where it would have Dropbox folders listed.