error when running app

[ziasultan2]

duplicate symbol 'OBJC_IVAR$_FLTCam._captureVideoOutput' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._videoWriterInput' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._captureVideoInput' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._assetWriterPixelBufferAdaptor' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._videoWriter' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._latestPixelBuffer' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._captureSession' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_CLASS$_FLTCam' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_METACLASS$_FLTCam' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._eventChannel' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._eventSink' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._previewSize' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._captureSize' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._onFrameAvailable' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._captureDevice' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
duplicate symbol 'OBJC_IVAR$_FLTCam._textureId' in:
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/camera/libcamera.a(CameraPlugin.o)
/Users/Raymond Tucker/Downloads/user-master 2/build/ios/Debug-iphoneos/fast_qr_reader_view/libfast_qr_reader_view.a(FastQrReaderViewPlugin.o)
ld: 16 duplicate symbols for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

[mikhail-karan]

I have this exact problem as well, still havn't found a workaround. I believe it happens when you a already have a camera view embedded into your app.

[facundomedica]

I'm not sure about this one and I don't have an iPhone to test 😢