I'm the developer of Open Camera, and I've had a reports of people unable to install my application due to "error 504" - usually this kind of thing is some device or Google Play issue that could happen with anything, but these all seem specific to Lenovo devices, particularly the Lenovo Vibe S1.
Someone sent me a screenshot showing that these devices have a pre-installed application "Stereo Verify", which has the same package name net.sourceforge.opencamera .
It's unclear what this app Stereo Verify does - it doesn't show as an application that can be launched, it only shows under Settings/Apps. Someone managed to launch it with QuickShortcutMaker, and said it "runs rather strange and only front (selfie) camera app" - they said it didn't look anything like the stock Lenovo camera.
It also uses the same icon that the early versions of Open Camera used.
The immediate problem is that users of this device can't install Open Camera. The more general question is whether this application is based on early versions of Open Camera, and if so, does it comply with the GPL...
For anyone with Lenovo phones - do you have this mysterious "Stereo Verify" on your phone? Does it prevent you being able to install Open Camera? Anyone know what this app might do? Did anyone receive either the source code, or a written offer for the source code to Stereo Verify?
Anyone know of a way to solve the problem or "error 504" where a pre-installed application has the same package name?
Thanks in advance,