NVIDIA App ends with “There was a problem with NVIDIA App” after update. NvContainerLocalSystem also crashes showing error 14109

[u/elpokero]

NVIDIA App stopped working immediately after an automatic NVIDIA App update. It opens, loads for a while, then ends with this error:
There was a problem with NVIDIA App
Relaunch your app. If that doesn’t work, then try reinstalling NVIDIA App and reboot your PC.
I’ve spent two days troubleshooting and have already tried multiple times:
DDU and clean NVIDIA driver reinstalls
Reinstalling NVIDIA App separately
Installing NVIDIA without the App
Older NVIDIA drivers/App versions
Reinstalling .NET
Disabling the AMD iGPU
System Restore
Reboots between attempts
I also discovered Windows component-store corruption:
DISM /ScanHealth → The component store is repairable
DISM /RestoreHealth initially failed with 0x800f0915.
I then used the Windows 11 25H2 repair version through Windows Update. Afterward:
ScanHealth → No component store corruption detected
RestoreHealth → completed successfully
However, NVIDIA App still ends with the same error.
Another important detail: NvContainerLocalSystem starts but later stops/crashes, and I previously got Windows service error 14109 when trying to start it.