Dropbox Fails To Start

Past few days Dropbox have not started on my Linux computer, I'm running Ubuntu 13.10. When I try to start Dropbox manually by command line, I get this error:

$ dropbox start

Starting Dropbox...Traceback (most recent call last):
  File "dropbox/client/main.py", line 13, in 
  File "autogen_explicit_imports.py", line 13, in 
  File "ui/common/selective_sync.py", line 6, in 
  File "arch/__init__.py", line 28, in 
  File "arch/linux/tracing.py", line 8, in 
  File "hard_trace.py", line 6, in 
  File "client_api/connection_hub.py", line 21, in 
  File "client_api/kv_connection.py", line 23, in 
  File "pylinux/__init__.py", line 71, in 
  File "cffi/api.py", line 311, in verify
  File "dropbox/overrides.py", line 398, in load_library
  File "cffi/verifier.py", line 69, in load_library
  File "cffi/verifier.py", line 154, in _load_library
  File "cffi/vengine_cpy.py", line 124, in load_library
VerificationError: importing '/home/olig/pylinux/__pycache__/_cffi__xa0c4f46bx1d95b4de.so': No module named _cffi__xa0c4f46bx1d95b4de

To fix this, open a terminal CTRL+T and run the following commands

sudo rm -rf /var/lib/dropbox/.dropbox-dist
dropbox start -i

Extra

For more Dropbox command line options

$ dropbox help

Dropbox command-line interface

commands:

Note: use dropbox help command to view usage for a specific command.

 status       get current status of the dropboxd
 help         provide help
 puburl       get public url of a file in your dropbox
 stop         stop dropboxd
 running      return whether dropbox is running
 update       download latest version of dropbox
 start        start dropboxd
 filestatus   get current sync status of one or more files
 ls           list directory contents with current sync status
 autostart    automatically start dropbox at login
 exclude      ignores/excludes a directory from syncing
 lansync      enables or disables LAN sync