Clojurians Log v2

I'm guessing that whatever secret you're trying to get from the config is stored as a #biff/env FOO or something instead of #biff/secret FOO. Biff stores wraps secrets in functions (e.g. so you don't leak them if you accidentally serialize your system map somehow), so when you try to get a secret, biff will call that value from your config as a function. But if it's not a #biff/secret then it won't actually be a function, and you'll get the IllegalArgumentException.