Can't launch after update

[Neideav]

Hello developers, I’ve been using Project Lightning for a few months and it worked fine, but after the version 5 update, I can no longer open the app. I’ve tried various methods using a VPN, disabling auto-updates, turning off my antivirus, etc. but when I asked the Discord community, they said they couldn't help, and if u ask my device (a laptop with i'm using windows 11 pro an RTX 4050 and i7-13620H). Please help me fix this issue caused by the update.

[Neideav]

I don't know why maybe the GPU doesn't support it or something—but I've tried various methods and nothing works.

[LightnigFast]

Hellooo
Do you have the last GPU drivers? I saw another guy with the same GPU that have this same problem

[Neideav]

hello Dev
GPU 0

NVIDIA GeForce RTX 4050 Laptop GPU

Driver version:	32.0.16.1074
Driver date:	02/07/2026
DirectX version:	12 (FL 12.2)
Physical location:	PCI bus 1, device 0, function 0

Utilization	0%
Dedicated GPU memory	0,0/6,0 GB
Shared GPU memory	0,0/7,9 GB
GPU Memory	0,0/13,9 GB

is it my last driver i copy from my task manager

[Neideav]

Maybe I should update to the latest version first? The Nvidia app is prompting me to update things like the game driver.

[LightnigFast]

Ye, try to update

[Neideav]

Hello Dev, i think i found the solution, so I'm going to the directory ProjectLightningV5 and type 'cmd' in the address bar Next, simply type the command "Project Lightning.exe" --disable-gpu --no-sandbox , and its work.

Simply put, the problem lies in a conflict between the application's built-in system and the graphics card (VGA/GPU) in the device, By adding the --disable-gpu and --no-sandbox commands, we are essentially giving the application a clear instruction: "Please just run using the standard processor, don't force the use of the graphics card, and temporarily disable the isolation security system."
Once we eliminated that main hurdle, the application was finally able to run without issues again.

[LightnigFast]

It’s actually quite strange, since in theory, you shouldn't need to use that on Windows. While there are sandbox-related issues on Linux, Windows is more advanced in that regard.

I'll take a look at it; thanks a lot for the information ♥

[Neideav]

I don't know why using just --disable-gpu previously made no difference, but after using the combination of --disable-gpu and --no-sandbox, there was a change and the app became usable again.

[Neideav]

after checking again, i can also use just --no-sandbox without --disable-gpu