Error setting up retropie

Log started at: Tue 13 Mar 22:55:45 UTC 2018

RetroPie-Setup version: 4.4 (cda9ffcb)
System: Linux retropie 4.14.30-v7+ #1102 SMP Mon Mar 26 16:45:49 BST 2018 armv7l GNU/Linux

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Running post update hooks
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Compiling /opt/retropie/supplementary/runcommand/joy2key.py ...
fatal: unable to access 'https://github.com/RetroPie/retropie-splashscreens.git/': Could not resolve host: github.com
Error running 'git pull' - returned 1

Log ended at: Tue 13 Mar 22:55:47 UTC 2018
Total running time: 0 hours, 0 mins, 2 secs