Unable to boot into recovery after flashing TWRP My phone model: Moto G Falcon
I flashed TWRP with the app. I am not able to boot into recovery mode. I get this error message:

Invalid boot image size!
failed to validate recovery image

I am stuck with Cyanogenmod12 Nightly. The thing is I am at least able to boot my phone.
Install adb-tools for your distribution. Check if it works with:


  fastboot devices


then install with:


  fastboot install recovery twrp*.img


For me the installation via twrp app did not work and I flashed it manually.