the package.xml is empty in catkin_ws

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hello there iam trying to build my cmake but i am facing alot of erorrs one of them is that the packlge.xml in the catkin_ws is empty anyb idea how can i fix it

evadro@evadro-PowerEdge-T620:~/catkin_ws$ catkin build
-----------------------------------------------------------
Profile:                     default
Extending:             [env] /opt/ros/kinetic
Workspace:                   /home/evadro/catkin_ws
-----------------------------------------------------------
Build Space:        [exists] /home/evadro/catkin_ws/build
Devel Space:        [exists] /home/evadro/catkin_ws/devel
Install Space:      [unused] /home/evadro/catkin_ws/install
Log Space:          [exists] /home/evadro/catkin_ws/logs
Source Space:       [exists] /home/evadro/catkin_ws/src
DESTDIR:            [unused] None
-----------------------------------------------------------
Devel Space Layout:          linked
Install Space Layout:        None
-----------------------------------------------------------
Additional CMake Args:       None
Additional Make Args:        None
Additional catkin Make Args: None
Internal Make Job Server:    True
Cache Job Environments:      False
-----------------------------------------------------------
Whitelisted Packages:        None
Blacklisted Packages:        None
-----------------------------------------------------------
Workspace configuration appears valid.
-----------------------------------------------------------
Traceback (most recent call last):
  File "/usr/bin/catkin", line 11, in <module>
    load_entry_point('catkin-tools==0.4.5', 'console_scripts', 'catkin')()
  File "/usr/lib/python2.7/dist-packages/catkin_tools/commands/catkin.py", line 272, in main
    catkin_main(sysargs)
  File "/usr/lib/python2.7/dist-packages/catkin_tools/commands/catkin.py", line 267, in catkin_main
    sys.exit(args.main(args) or 0)
  File "/usr/lib/python2.7/dist-packages/catkin_tools/verbs/catkin_build/cli.py", line 422, in main
    summarize_build=opts.summarize  # Can be True, False, or None
  File "/usr/lib/python2.7/dist-packages/catkin_tools/verbs/catkin_build/build.py", line 283, in build_isolated_workspace
    workspace_packages = find_packages(context.source_space_abs, exclude_subspaces=True, warnings=[])
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/packages.py", line 89, in find_packages
    packages = find_packages_allowing_duplicates(basepath, exclude_paths=exclude_paths, exclude_subspaces=exclude_subspaces, warnings=warnings)
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/packages.py", line 150, in find_packages_allowing_duplicates
    xml, filename=filename, warnings=warnings)
  File "/usr/lib/python2.7/dist-packages/catkin_pkg/package.py", line 598, in parse_package_string
    raise InvalidPackage('The manifest contains invalid XML:\n%s' % ex, filename)
catkin_pkg.package.InvalidPackage: Error(s) in package '/home/evadro/catkin_ws/src/./package.xml':
The manifest contains invalid XML:
no element found: line 1, column 0