I tried entering the Mausoleum System and got:
Error loading [graphics/backgrounds/anvil_background_exalted.jpg] resource, not found...
Spoiler
java.lang.RuntimeException: Error loading [graphics/backgrounds/anvil_background_exalted.jpg] resource, not found in [D:\Games\Starsector\starsector-core\..\mods\Anvil Industries,D:\Games\Starsector\starsector-core\..\mods\Better Colonies,D:\Games\Starsector\starsector-core\..\mods\CombatAnalytics,D:\Games\Starsector\starsector-core\..\mods\Combat Chatter,D:\Games\Starsector\starsector-core\..\mods\Commissioned Crews,D:\Games\Starsector\starsector-core\..\mods\Common Radar,D:\Games\Starsector\starsector-core\..\mods\Console Commands,D:\Games\Starsector\starsector-core\..\mods\Industrial.Evolution1.7.d,D:\Games\Starsector\starsector-core\..\mods\Interesting Portraits Pack,D:\Games\Starsector\starsector-core\..\mods\JP_RC,D:\Games\Starsector\starsector-core\..\mods\Kadur Remnant,D:\Games\Starsector\starsector-core\..\mods\LazyLib,D:\Games\Starsector\starsector-core\..\mods\Leading Pip,D:\Games\Starsector\starsector-core\..\mods\Luddic_Enhancement,D:\Games\Starsector\starsector-core\..\mods\MagicLib,D:\Games\Starsector\starsector-core\..\mods\Nexerelin,D:\Games\Starsector\starsector-core\..\mods\PirateCollection,D:\Games\Starsector\starsector-core\..\mods\Ruthless Sector,D:\Games\Starsector\starsector-core\..\mods\SSMSQoL-1.3,D:\Games\Starsector\starsector-core\..\mods\Ship and Weapon Pack,D:\Games\Starsector\starsector-core\..\mods\SkilledUp,D:\Games\Starsector\starsector-core\..\mods\SpeedUp,D:\Games\Starsector\starsector-core\..\mods\Stop Gap Measure,D:\Games\Starsector\starsector-core\..\mods\Supply Forging,D:\Games\Starsector\starsector-core\..\mods\Transfer All Items,D:\Games\Starsector\starsector-core\..\mods\UnknownSkies,D:\Games\Starsector\starsector-core\..\mods\Vayra's Sector,D:\Games\Starsector\starsector-core\..\mods\Vayra's Ship Pack,D:\Games\Starsector\starsector-core\..\mods\Version Checker,D:\Games\Starsector\starsector-core\..\mods\WeaponArcs,D:\Games\Starsector\starsector-core\..\mods\ToggleWeaponGroup,D:\Games\Starsector\starsector-core\..\mods\Audio Plus,D:\Games\Starsector\starsector-core\..\mods\GraphicsLib,../starfarer.res/res,CLASSPATH]
Looking into the Mod folder, it seems that
anvil_background_exalted.png is present, but not a
.jpg version.
Copy&Paste into MSPaint and saving as .jpg solved the issue.
Enabled Mods:
Spoiler
"anvil_industries", (version 1.2.1 also 1.2.2)
"timid_admins",
"CombatAnalytics",
"chatter",
"timid_commissioned_hull_mods",
"lw_radar",
"lw_console",
"deconomics",
"interestingportraitspack",
"junk_pirates_release",
"kadur_remnant",
"lw_lazylib",
"leadingPip",
"luddenhance",
"MagicLib",
"nexerelin",
"yunru_pirate_collection",
"sun_ruthless_sector",
"SSMSQoL",
"swp",
"bonomel_skilledup",
"speedUp",
"StopGapMeasures",
"timid_supply_forging",
"transfer_all_items",
"US",
"vayrasector",
"vayrashippack",
"lw_version_checker",
"WEAPONARCS",
"toggleWeapons",
"audio_plus",
"shaderLib"