I've always deleted the last exceptions before opening the game. This is the most recent one:
<?xml version="1.0" ?><root>
<BetterExceptions><BEversion>v3.13</BEversion><WasBlank>False</WasBlank><TuningLoadFinished>False</TuningLoadFinished><BadObjectCC>False</BadObjectCC><Advice>This is likely due to bad tuning. Check the Summary and Broken Mods section in BE Report.</Advice></BetterExceptions><report><version>2</version><sessionid>82814dd2c839810067caec66</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2025-03-07 22:54:30</createtime><buildsignature>Local.Unknown.Unknown.1.113.291.1020-1.300.000.207.Release</buildsignature><categoryid>snippet.py:334</categoryid><desyncid>82814dd2c839810067caec66</desyncid><systemconfig/><screenshot/><desyncdata> Failure: 'xml_injector/snippet' (xml_injector.snippet) type object 'Trait' has no attribute 'TunableReference' (AttributeError: type object 'Trait' has no attribute 'TunableReference') Traceback (most recent call last): File "T:\InGame\Gameplay\Scripts\Core\sims4\importer\utils.py", line 120, in import_modules_by_path File "<frozen importlib._bootstrap>", line 983, in _find_and_load File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 668, in _load_unlocked File "<frozen importlib._bootstrap>", line 638, in _load_backward_compatible File "T:\InGame\Gameplay\Scripts\Core\sims4\importer\custom_import.py", line 196, in load_module File "C:\SimsCompile\SCUMBUMBO--XmlInjector\v4-high-school-patch-fix\Scripts\snippet.py", line 156, in <module> File "C:\SimsCompile\SCUMBUMBO--XmlInjector\v4-high-school-patch-fix\Scripts\snippet.py", line 334, in XmlInjector AttributeError: type object 'Trait' has no attribute 'TunableReference'rtim=0 ClientInfo isn't here</desyncdata></report>
</root>
That is from a modded game.
Please move your mods folder to the desktop, delete Documents > Electronic Arts > The Sims 4 > localthumbcache, repair your game and then try again on a backup of your save to see of you can duplicate the issue on a game with no mods.
Also delete any lastExceptions, lastCrash or lastUIException files you have and then start the game.
See if you still get a LE and post that.
