"Warning"s running Stacks 2.0 TestNet

I installed Blockstack 2.0 Test Net and attempted mining as per docs.blockstack.org/start-mining … Suddenly I got warnings and it terminated (or perhaps I terminated it by accident). Nevertheless, “WARNING”'s began to populate the terminal.

The terminal log is Blockstack 2.0 Testnet Mining - Pastebin.com … any help would be greatly appreciated. If someone fluent in this can also message me, I’d love the help.

I love Blockstack’s mission and I plan to be a valuable newbie.