PSPDFKit needs various resources — such as images, character maps, bundles, and localization files — to work. For example, if your setup is unusual (e.g. using the Appcelerator Titanium plugin), you need to manually drag
PSPDFKit.bundle into your application. It should be in your application bundle, but valid locations are also
PSPDFKit will display both log warnings and, if a debugger is attached, an alert if there is an issue with the resource bundle.
The bundle is also internally versioned to make sure you don’t use an old bundle with a new version. In a case where you do, you might see a variation of the error asking you to update the bundle.