Cent OS has RPM based package management (i.e. yum), which make it very similar to Fedora. Did you install such package either for 64-bit or 32-bit using yum? If you have installed something already, remove everything and try the following, on already downloaded RPM version (I use 64-bit version here):
sudo yum instsall nautilus-dropbox-2019.02.14-1.fedora.x86_64.rpm
What is the result? Post the entire terminal output in your next post (including command and output), in code block (</>), if something goes wrong.
@Walter, what about my post/question to you?! Is there any chance?
Re: I cannot install the desktop app on Linux CentOs. Any ideas?