I've already done a fresh install of Starsector after encountering this error. I can confirm that it is something within the mods, because this does not occur in Vanilla.
I have these mods enabled:
Spoiler
Autosave 1.0d
Citadel 0.8
Common Radar 2.1
Interstellar Imperium 1.9.0
LazyLib 2.1
Leading Pip 1.7.4
The Knights Templar 0.9.5
Upgraded Rotary Weapons 1.0
Version Checker 1.4c
ZZ ShaderLib Beta 1.10
The game returns this error after a CTD:
Spoiler
Fatal:
com.fs.starfarer.api.campaign.StarSystemAPI.initStar(Ljava/lang/String;Ljava/lang
/String;F)Lcom/fs/starfarer/api/campaign/PlanetAPI;
It also states to check the starsector.log for more info, which has this:
Spoiler
ERROR com.fs.starfarer.combat.CombatMain - java.lang.NoSuchMethodError: com.fs.starfarer.api.campaign.StarSystemAPI.initStar(Ljava/lang/String;Ljava/lang/String;F)Lcom/fs/starfarer/api/campaign/PlanetAPI;
java.lang.NoSuchMethodError: com.fs.starfarer.api.campaign.StarSystemAPI.initStar(Ljava/lang/String;Ljava/lang/String;F)Lcom/fs/starfarer/api/campaign/PlanetAPI;
at data.scripts.world.citadel.Citadel.generate(Citadel.java:40)
at data.scripts.world.citadel.DefendersGen.generate(DefendersGen.java:17)
at data.scripts.CITModPlugin.initCIT(CITModPlugin.java:22)
at data.scripts.CITModPlugin.onNewGame(CITModPlugin.java:72)
at com.fs.starfarer.campaign.save.CampaignGameManager.o00000(Unknown Source)
at com.fs.starfarer.title.TitleScreenState.dialogDismissed(Unknown Source)
at com.fs.starfarer.ui.M.dismiss(Unknown Source)
at com.fs.starfarer.ui.impl.oooO.dismiss(Unknown Source)
at com.fs.starfarer.campaign.save.J.actionPerformed(Unknown Source)
at com.fs.starfarer.ui.h.o00000(Unknown Source)
at com.fs.starfarer.ui.null.processInput(Unknown Source)
at com.fs.starfarer.ui.U.o00000(Unknown Source)
at com.fs.starfarer.BaseGameState.traverse(Unknown Source)
at com.fs.state.AppDriver.begin(Unknown Source)
at com.fs.starfarer.combat.CombatMain.main(Unknown Source)
at com.fs.starfarer.StarfarerLauncher$2.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Any help would be greatly appreciated! :)