installing ninja

Hi MG5 team,

I am generating ttbar samples at NLO, (adding [QCD]) and in the process, MG5 wants to install ninja. I am getting this:

You are installing 'ninja', please cite ref(s): arXiv:1203.0291, arXiv:1403.1229, arXiv:1604.01363.
Downloading the HEPToolInstaller at:
   http://madgraph.physics.illinois.edu/Downloads/HEPToolsInstaller/HEPToolsInstaller_V99.tar.gz
Now installing ninja. Be patient...
Fetching data with command:
  wget --no-check-certificate https://bitbucket.org/peraro/ninja/downloads/ninja-latest.tar.gz
--2018-03-05 14:54:59-- https://bitbucket.org/peraro/ninja/downloads/ninja-latest.tar.gz
Resolving bitbucket.org... 104.192.143.2, 104.192.143.3, 104.192.143.1, ...
Connecting to bitbucket.org|104.192.143.2|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://bbuseruploads.s3.amazonaws.com/21678e19-7e54-4a85-867a-6501efba753d/downloads/4424e9c9-a51d-4505-89dd-08e4c2458f85/ninja-latest.tar.gz?Signature=1bzg9BIVkR%2B0gGTO%2FmOQ0A3RHjE%3D&Expires=1520281500&AWSAccessKeyId=AKIAIQWXW6WLXMB5QZAQ&versionId=aC2DjNeNwcxy11KQy7SnI2._rgfQJjCR&response-content-disposition=attachment%3B%20filename%3D%22ninja-latest.tar.gz%22 [following]
--2018-03-05 14:55:00-- https://bbuseruploads.s3.amazonaws.com/21678e19-7e54-4a85-867a-6501efba753d/downloads/4424e9c9-a51d-4505-89dd-08e4c2458f85/ninja-latest.tar.gz?Signature=1bzg9BIVkR%2B0gGTO%2FmOQ0A3RHjE%3D&Expires=1520281500&AWSAccessKeyId=AKIAIQWXW6WLXMB5QZAQ&versionId=aC2DjNeNwcxy11KQy7SnI2._rgfQJjCR&response-content-disposition=attachment%3B%20filename%3D%22ninja-latest.tar.gz%22
Resolving bbuseruploads.s3.amazonaws.com... 52.216.17.120
Connecting to bbuseruploads.s3.amazonaws.com|52.216.17.120|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 581743 (568K) [application/x-tar]
Saving to: “ninja-latest.tar.gz?Signature=1bzg9BIVkR+0gGTO%2FmOQ0A3RHjE=&Expires=1520281500&AWSAccessKeyId=AKIAIQWXW6WLXMB5QZAQ&versionId=aC2DjNeNwcxy11KQy7SnI2._rgfQJjCR&response-content-disposition=attachment; filename="ninja-latest.tar.gz"”

100%[===============================================================================================================================================================>] 581,743 2.74M/s in 0.2s

2018-03-05 14:55:01 (2.74 MB/s) - “ninja-latest.tar.gz?Signature=1bzg9BIVkR+0gGTO%2FmOQ0A3RHjE=&Expires=1520281500&AWSAccessKeyId=AKIAIQWXW6WLXMB5QZAQ&versionId=aC2DjNeNwcxy11KQy7SnI2._rgfQJjCR&response-content-disposition=attachment; filename="ninja-latest.tar.gz"” saved [581743/581743]

Could not download data at '/tmp/tmp2FubIA/ninja-latest.tar.gz'.
Command "import /home/abouibrahim.a/MG5_aMC_v2_6_0/bin/loop_proc_card.dat" interrupted in sub-command:
"output tt_qcd" with error:
InvalidCmd : Installation of ninja failed.
quit

It seems that the tarball was downloaded but I'm not sure why it says "Could not download". I tried several times so I don't think it is a network issue. Any idea what's happening?

Thank you,
Amin