did already do pnpm run signet -- add --name main-key? if so, do you have signet.json in ~/.signet-config? you could run DEBUG=signet:* pnpm run signet -- start --key main-key and see if there's any output that might help me figure out what's going on.
Discussion
I did run that, but actually, now that you have asked me to check--it did not create the signet.json file!