Display Diagrams Not Working

Hello,

I am trying to generate a process in MadGraph. After I generate it, I want to display diagrams. However, I get this error:

Total: 4 processes with 4 diagrams
MG5_aMC>display diagrams
Drawing Process: u u~ > z > mu+ mu- WEIGHTED<=4 @1
Wrote file /tmp/diagrams_1_uux_z_mupmum.eps
open /tmp/diagrams_1_uux_z_mupmum.eps
Drawing Process: c c~ > z > mu+ mu- WEIGHTED<=4 @1
Wrote file /tmp/diagrams_1_ccx_z_mupmum.eps
open /tmp/diagrams_1_ccx_z_mupmum.eps
Drawing Process: d d~ > z > mu+ mu- WEIGHTED<=4 @1
Unhandled exception in thread started by <function call at 0x7fbbb476bc08>Wrote file /tmp/diagrams_1_ddx_z_mupmum.eps

Traceback (most recent call last):
open /tmp/diagrams_1_ddx_z_mupmum.eps
  File "/usr/lib/python2.7/subprocess.py", line 172, in call
Drawing Process: s s~ > z > mu+ mu- WEIGHTED<=4 @1
    Unhandled exception in thread started by <function call at 0x7fbbb476bc08>
Traceback (most recent call last):
  File "/usr/lib/python2.7/subprocess.py", line 172, in call
return Popen(*popenargs, **kwargs).wait()
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
  File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
        errread, errwrite)
errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
  File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
Wrote file /tmp/diagrams_1_ssx_z_mupmum.eps
    open /tmp/diagrams_1_ssx_z_mupmum.eps
    raise child_exception
time to draw 0.063835144043
raise child_exception
OSErrorOSError: [Errno 2] No such file or directory: [Errno 2] No such file or directory
MG5_aMC>
Unhandled exception in thread started by <function call at 0x7fbbb476bc08>
Traceback (most recent call last):
  File "/usr/lib/python2.7/subprocess.py", line 172, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
Unhandled exception in thread started by <function call at 0x7fbbb476bc08>
Traceback (most recent call last):
  File "/usr/lib/python2.7/subprocess.py", line 172, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 394, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1047, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory

I then need to ctrl+c to finish the error or then it just gets hung up. How can I fix it. I do I have XMing and I click on it before displaying the diagrams but I still get the error. Here is how my MadGraph is configured:

************************************************************
* *
* W E L C O M E to *
* M A D G R A P H 5 _ a M C @ N L O *
* *
* *
* * * *
* * * * * *
* * * * * 5 * * * * *
* * * * * *
* * * *
* *
* VERSION 2.6.6 2018-06-28 *
* *
* The MadGraph5_aMC@NLO Development Team - Find us at *
* https://server06.fynu.ucl.ac.be/projects/madgraph *
* and *
* http://amcatnlo.web.cern.ch/amcatnlo/ *
* *
* Type 'help' for in-line help. *
* Type 'tutorial' to learn how MG5 works *
* Type 'tutorial aMCatNLO' to learn how aMC@NLO works *
* Type 'tutorial MadLoop' to learn how MadLoop works *
* *
************************************************************
load MG5 configuration from input/mg5_configuration.txt
None does not seem to correspond to a valid fastjet-config executable (v3+). We will use fjcore instead.
 Please set the 'fastjet'variable to the full (absolute) /PATH/TO/fastjet-config (including fastjet-config).
 MG5_aMC> set fastjet /PATH/TO/fastjet-config

lhapdf-config does not seem to correspond to a valid lhapdf-config executable.
Please set the 'lhapdf' variable to the (absolute) /PATH/TO/lhapdf-config (including lhapdf-config).
Note that you can still compile and run aMC@NLO with the built-in PDFs
 MG5_aMC> set lhapdf /PATH/TO/lhapdf-config

Specified text editor emacs not valid.
Using default text editor "vi". Set another one in ./input/mg5_configuration.txt
No valid web browser found. Please set in ./input/mg5_configuration.txt
Loading default model: sm
INFO: Restrict model sm with file models/sm/restrict_default.dat .
INFO: Run "set stdout_level DEBUG" before import for more information.
INFO: Change particles name to pass to MG5 convention
Defined multiparticle p = g u c d s u~ c~ d~ s~
Defined multiparticle j = g u c d s u~ c~ d~ s~
Defined multiparticle l+ = e+ mu+
Defined multiparticle l- = e- mu-
Defined multiparticle vl = ve vm vt
Defined multiparticle vl~ = ve~ vm~ vt~
Defined multiparticle all = g u c d s u~ c~ d~ s~ a ve vm vt e- mu- ve~ vm~ vt~ e+ mu+ t b t~ b~ z w+ h w- ta- ta+

Can you please help me fix the problem? Thanks!