This was the exception report - if that helps anyone
<?xml version="1.0" ?><root>report><version>2</version><sessionid>f03ef16bacb95c2b6a07abff</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2026-05-15 23:44:23</createtime><buildsignature>Local.Unknown.Unknown.1.124.55.1030-1.200.000.708.Release</buildsignature><categoryid>(AS)widgets.CAS.Molecule.data::CASPreferencesSelectionDataFeed</categoryid><desyncid>f03ef16bacb95c2b6a07abff</desyncid><systemconfig/><screenshot/><desyncdata>TypeError: Error #1009: Cannot access a property or method of a null object reference. at widgets.CAS.Molecule.data::CASPreferencesSelectionDataFeed/AddSelectedTraitToCache() at widgets.CAS.Molecule.data::CASPreferencesSelectionDataFeed/SetSimInfo() at widgets.CAS.Molecule::EquippedTraitsAsp/SetSimInfo() at olympus.core.widget::WidgetBase/Initialize() at olympus.core::LayoutManager/LoadWidgetCompleteHandler() rtim=73884 Client Session Time: 252.79 Num Save Errors: 0 Num Load Errors: 0 Current Game State: 0x96d01090 LoadingScreenActiveFlag: 1 Origin Version: 13,696,0,6209 Modded: True SystemInfo: Windows 11 10.0.26200 GPU: AMD Radeon(TM) Graphics 31.0.21914.8004, GUID: ED42EE1B-BB2A-11EF-8A12-81EC8B4E42B4 </desyncdata></report>
</root>