EXCEPTION: St13runtime_error

after going through the test and passing i go to start the miner i get this error

EXCEPTION: St13runtime_error
could not load param file at /root/.zcash-params/z7-verifying.key
bitcoin in AppInit()

what do i need to do to fix this?

I copied z7-verifying.key from /…/.zcash-params/testnet3/ to /…/.zcash-params/

I had the same issue when trying to setup the alpha and my issue was i running in sudo su. I made it a habit running in that because i got tired of using the sudo command so much. As soon as I restarted Terminal i ran it regular and no more error.