i tried filing a support ticket about this a couple of days ago and haven't heard back, but i'm unable to get my inbox to decrypt on my second computer. the com

i tried filing a support ticket about this a couple of days ago and haven't heard back, but i'm unable to get my inbox to decrypt on my second computer. the computer i set the account up on works fine, but it just tells me that it doesn't have a private key when i try to look at my inbox on my laptop. i tried uploading the .json file that i guess is my keypair that downloaded when i set up the account, but it doesn't seem to do anything, just keeps saying no private key. chrome on ubuntu on both devices.