dolfin-convert not working at all

dolfin-convert does not work for any type of mesh. Minimal gmsh-file:

lc1 = 0.01;
lc2 = 0.01;
Point(1) = {0, 0, 0, lc2};
Point(2) = {1, 0, 0, lc2};
Point(3) = {1, 1, 0, lc2};
Point(4) = {0, 1, 0, lc2};
Line(1) = {1, 2};               // bottom line
Line(2) = {2, 3};               // right line
Line(3) = {3, 4};               // top line
Line(4) = {4, 1};               // left line
Line Loop(5) = {1, 2, 3, 4};    
Plane Surface(6) = {5};

Error:

dolfin-convert unitsquare.msh unitsquare.xml
Converting from Gmsh format (.msh, .gmsh) to DOLFIN XML format
Traceback (most recent call last):
  File "/home/dokken/V_envs/dolfin_logg/env/bin/dolfin-convert", line 132, in <module>
    main(sys.argv[1:])
  File "/home/dokken/V_envs/dolfin_logg/env/bin/dolfin-convert", line 79, in main
    meshconvert.convert2xml(ifilename, ofilename, iformat=iformat)
  File "/home/dokken/V_envs/dolfin_logg/env/lib/python3.5/site-packages/dolfin_utils/meshconvert/meshconvert.py", line 1299, in convert2xml
    convert(ifilename, XmlHandler(ofilename), iformat=iformat)
  File "/home/dokken/V_envs/dolfin_logg/env/lib/python3.5/site-packages/dolfin_utils/meshconvert/meshconvert.py", line 1320, in convert
    gmsh2xml(ifilename, handler)
  File "/home/dokken/V_envs/dolfin_logg/env/lib/python3.5/site-packages/dolfin_utils/meshconvert/meshconvert.py", line 345, in gmsh2xml
    mesh_editor.open( mesh, highest_dim, highest_dim )
NotImplementedError: Wrong number or type of arguments for overloaded function 'MeshEditor_open'.
  Possible C/C++ prototypes are:
    dolfin::MeshEditor::open(dolfin::Mesh &,dolfin::CellType::Type,std::size_t,std::size_t,std::size_t)
    dolfin::MeshEditor::open(dolfin::Mesh &,std::string,std::size_t,std::size_t,std::size_t)
    dolfin::MeshEditor::open(dolfin::Mesh &,std::string,std::size_t,std::size_t)

Aborted (core dumped)

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