I do not believe dropbox is running. running dropbox status generates an error. When I invoke dropbox from a terminal, I am getting an error message

~$ dropbox
  File "/usr/bin/dropbox", line 232
    except OSError, e:
                  ^
SyntaxError: invalid syntax

For context the rest of that section of the file reads:

 with closing(sock) as f:
        yield (0, True)
        while True:
            try:
                chunk = f.read(bufsize)
                progress += len(chunk)
                buf.write(chunk)
                yield (float(progress)/size, True)
                if progress == size:
                    break
            except OSError, e:
                if hasattr(e, 'errno') and e.errno == errno.EAGAIN:
                    # nothing left to read
                    yield (float(progress)/size, False)
                else:
                    raise

However I am out of my depth and don't know how to proceed with fixing the problem.

I tried to reinstall dropbox and recieved this message:

~$ sudo apt install --reinstall dropbox
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Reinstallation of dropbox is not possible, it cannot be downloaded.

Ubuntu Software lists Dropbox in the gui as one of the installed packages. However when I try to remove it to reinstall, I get an error "Unable to remove Dropbox, no packages to remove"

Ubuntu 20.04

Other information:

~$ echo $XDG_CURRENT_DESKTOP 
ubuntu:GNOME 
~$ dpkg -S /usr/bin/dropbox
dropbox: /usr/bin/dropbox 
Python 3.8.10 
Python2 2.7.18 
Python3 3.8.10

~$ apt-cache policy dropbox 
dropbox: Installed: 2015.10.28 
Candidate: 2015.10.28 Version table: *** 2015.10.28 100 100 /var/lib/dpkg/status