No idea what's causing it yet. I have the three mods that require DLCs uninstalled and determined that wasn't the issue.

Not sure what mods are being the problem but heres the list of active mods in the same playset.

Ancient Empire 2.0 [Stellaris 4.0]
Ancient Empire - UI Overhaul Dynamic Patch
Warship Girls Advisor
Warship Girls R And MIST Species
Star Wars: Kuat Ancient empire
Universal Rsource patch [2.4+] (possibly problematic)
UI Overhaul Dynamic
United Fleet Shipset
Warship Girls BGM
[United Fleet]Mobile Shipyard
Nirvana Empire
Star Wars: UnknownWorld Shipgirls Story
The Nanites Revolution
Tasty Maid: Portraits 美味女仆：肖像
Flags in the void
Stellaris 101: How to read (possibly problematic)
Flags, Emblems and Backgrounds Merged
Centered Flag Emblems
Trait Point Traits