Remove the New Galactic Order.
That sorted it, Thanks a bunch 
Just curios, how was you able to tell that was the mod causing the issue?
The first line of the log says 'mobile_headquarters' not found.
This is a hull mod from a previous version of "Starsector +" by Dark.Revenant, which was removed about 2 or 3 months ago when the mod was broken up for easier management.
NGO has this hull mod on one of its ships, but the mod itself doesn't contain the data file it needs to use the hull mod since it originally came from somewhere else.
Aside from that, this issue has been going around for months, so majority of the forumers know this. There is a workaround (which is to remove the hull mod manually) that enables you to play the mod, but it has some bug issues I think.
EDIT: Someone beat me to it while writing up this response, so I'll provide the workaround solution.
To remove this hull mod in question open this file here, you can use notepad, or any other text editor. Preferably, use Notepad ++, as it makes it much easier to scroll and search.
/gamedir/mods/NGO/data/hulls/ngo_battlefreighter.ship
Do a search for this command below, and simply delete mobile_headquarters from the file, save and you should be good to go.
"builtInMods": [
"NGOhullmod",
"mobile_headquarters"
],
.
There is a link on the last page of the mod thread that has another fix related to phase ships that also covers this fix. Download that if you wish. To make it simpler: here's the link and the comment related to the fix.
By DrakonST: (With some grammatical corrections)
This is a fixed version of this mod (New Galactic Order). Works without requiring the old version of "Starsector+".
Contains fix for the destroyer "Dellingr". The fix makes it so that the phase cloak system of that ship matches the parameters set by the core game/Vanilla (cool down of phase cloak is now 2).
Link -
https://yadi.sk/d/GSUKyTHDtGQ6V.
Warning: Use at your own risk as this mod has some other situations where it will crash. It is recommended to try activating mods one by one to test compatibility with the mod you want to play with, particularly when dealing with big game changing mods such as Nexerelin.
