Enchanted by Nature - unable to play at all

NettieVT​  I think you're seeing this error, right?

Sims 4 error: Failed to launch game | EA Forums - 11904395

If it's on the EA App end, and it appears to be, then I'm not sure there's anything you can do on your end.  But if you have at least access to another computer to test with, that would be useful.  If the game launches, the problem is on your main computer; if it doesn't, it's probably an EA or account issue, although the two systems could share something in common of course.

Your dxdiag shows a couple of crashes of LEDKeeper, so I would uninstall that for now.  The Sims 4 crashes point to a component of Windows that's unlikely to be corrupt, considering you can use your computer at all.  They're also all for the DirectX 11 version of the game.  So they might be stale, or you may not have applied the DX9 setting correctly.

To check please pen the Reliability Monitor.  Click Windows key-R and enter "perfmon /rel" without quotes, and you'll see a chart of errors and updates with a column for each day.  Today is on the right.

Look for an error that happened at exactly the time of your most recent attempt to open Sims 4.  If you find one, double-click it to see more details, then copy that info and paste it into a reply here.  If you don't see a new error, check back in an hour or so—the Reliability Monitor doesn't always update right away.

If you still don't find one, that means the game is probably being blocked from starting rather than crashing.  That would be in line with an EA-side issue, although local permissions-related problems can cause this as well.

Oh so I found the LED thing - 

Description
Faulting Application Path:    C:\Program Files (x86)\MSI\MSI Center\Mystic Light\LEDKeeper2.exe

Problem signature
Problem Event Name:    CLR20r3
Problem Signature 01:    LEDKeeper2.exe
Problem Signature 02:    3.0.10.4
Problem Signature 03:    66b2d919
Problem Signature 04:    LEDKeeper2
Problem Signature 05:    3.0.10.4
Problem Signature 06:    66b2d919
Problem Signature 07:    af9
Problem Signature 08:    11be
Problem Signature 09:    System.NullReferenceException
OS Version:    10.0.26100.2.0.0.768.101
Locale ID:    3081
Additional Information 1:    20be
Additional Information 2:    20be10d8cb63dbafaa4056e9e9e7b122
Additional Information 3:    655e
Additional Information 4:    655e96ecfa76e0b3ccb8b31c28542e33

Extra information about the problem
Bucket ID:    df73e803eb2395df73e95e9a91bbac84 (1434781974257183876)

NettieVT​  Yes, that would be it.  If you don't want to uninstall it entirely, at least kill it in the Task Manager before you try to play.  It would probably be in the background processes list, and there might be more than one entry, depending on how it's configured.  I don't use it myself, so I can't check.  But look for LED Keeper and Mystic Light and anything that starts with MSI and looks like it could be related.

Well darn it, I found the program under Mystic light and it's showing as stopped now so re tried and now nothing happening unfortunately. No more failure to launch error, when I go to play it just blinks to the launching game and then opens up the app screen again. Alas 'tis a quandary but I do greatly appreciate your guidance with this. 

Source
The Sims™ 4

Summary
Stopped working

Date
‎20/‎07/‎2025 10:28 AM

Status
Report sent

Description
Faulting Application Path:    C:\Program Files\EA Games\The Sims 4\Game\Bin\TS4_x64.exe

Problem signature
Problem Event Name:    APPCRASH
Application Name:    TS4_x64.exe
Application Version:    1.116.232.1030
Application Timestamp:    687073a4
Fault Module Name:    ntdll.dll
Fault Module Version:    10.0.26100.4652
Fault Module Timestamp:    6c6bd922
Exception Code:    c0000005
Exception Offset:    0000000000039463
OS Version:    10.0.26100.2.0.0.768.101
Locale ID:    3081
Additional Information 1:    0506
Additional Information 2:    0506e83216f9139b7f11a0a1d5e1c319
Additional Information 3:    b03a
Additional Information 4:    b03ae8833ce6313a0d3984308a42b695

Extra information about the problem
Bucket ID:    c705abe9e2c5dc610305d319341f1856 (1370733766806280278)

NettieVT​  Try forcing the game to open in DirectX 9 mode, since it's not doing so currently.  (TS4_x64 corresponds to the DX11 version of the game; DX9 uses TS4_DX9_x64.)  Open the EA App, click Sims 4 > Manage > View properties, and add -dx9 to the command line box.  Remove -dx11 if it's there, of course.

If that doesn't help, try playing in a new admin Windows account.  Make it local, as in, don't link it to your Microsoft account.  You'll be able to (try to) launch Sims 4 without reinstalling anything, but your saves and other user data, if you have any, won't be available.  That can be addressed later if necessary.

If this doesn't help either, then I really would suggest testing on a different system.  Alternately, you could test a different account on your system.  You might be able to borrow an account from a friend or family member, or have them login on your computer and try to play.  Since Sims 4 is free, they don't need to own it already.