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Can't install the valley of the ancients demo, launcher just crashes.

As title says getting this error when trying to install the UE5 demo.

Assertion failed: !CachedTargetEngineString.IsEmpty()
[File:D:/Build/++Portal/Sync/Portal/Source/Programs/EpicGamesLauncher/Layers/Presentation/Private/CreateProjectDialogViewModel.cpp]
[Line: 260]
0x00007ffb8ad54b89 KERNELBASE.dll!UnknownFunction []
0x00007ff6a84ada97 EpicGamesLauncher.exe!UnknownFunction []
0x00007ff6a84aff1c EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a847a6da
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8433029
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a84330a0
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a90aab2f
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a906f823
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a92ba695
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8fa9b45
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a9045300
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a82293fd
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8f41999
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8f2a21e
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a9023434
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8fece63
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a91c2310
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a90643e7
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a907602d
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8dfe7a7
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a90a0946
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a906392f
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a907604d
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a9075f8b
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8e12f64
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8dea887
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8cc3653
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a89e77b9
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8a11c5e
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a89fa15d
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8b5bba6
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8b36f2f
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a86dfee3
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8b73d5f
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a8398d54
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a82aafa6
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a82a7567
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a82a77c7
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ff6a99525a6
EpicGamesLauncher.exe!UnknownFunction [] 0x00007ffb8ca97034
KERNEL32.DLL!UnknownFunction [] 0x00007ffb8d322651 ntdll.dll!UnknownFunction []

I’ve just been around in circles with about 4 people from launcher support and they’ve handballed me off to these forums.

Please help I just want to see the demo.

1 Like

I was having a similar issue, turns out I was low on space. I’d recommend to double check and make sure you have enough space (on whatever drive your UE vault is stored).

Yeah it’s on my C: M2 SSD still says i have ~285gb

I’m thinking it’s something to do with that code error and the fact it’s trying to install on D: when I don’t actually have a D: on my computer I go C: E: F: G: H:

been round and round in circles with support done everything they asked - Checked for updates, cleared the webcache, run as administrator, uninstalled and reinstalled, graphic drivers are upto date and server status is ok

They’ve handballed me here saying it’s a UE problem and not the launcher but the launcher is what keeps on crashing as soon as I click the button to get the demo it crashes.

When you click on the ‘Get sample’ button, it pops up one window to ask you the name and location to put it. Same as you create projects in UE4.

So have you created project in UE4 recently? I’m thinking they might come from the same root.

nope as soon as I click on that ‘Get Sample’ button the launcher crashes with that error message.

No pop up box, and I don’t currently have UE4 or anything installed cause it all got uninstalled during tech support.

My suggestion is you got to make the UE4 project installation run successfully first. UE5 apparently is built above that.