I'm trying to set up offline signing using CLI. My setup is as follows: I have a fully synced (via remote node) view only wallet on Mac OS X and I have a cold wallet set up on Raspberry Pi (OS: Ubuntu Mate). Following this guide I exported the outputs from the hot wallet.

When trying to import the file to the cold wallet, it tells me "Error: failed to decrypt outputs: Failed to authenticate criphertext".

Can someone tell me what I'm doing wrong?