Has anyone here tried their encrypted messages with Adele?

I sent an encrypted email, attached my public key, and I get this:

--citation begins--
Unfortunately I could not encrypt my reply to you. A possible reason
is that the key you sent me might be a signing-only key (set so during
key generation). You can sign with such a key but one cannot encrypt
messages with it.

Since your message to me was encrypted, it may have contained sensitive
data. Therefore I won't quote it in my unencrypted answer. If you send
me a key that I can encrypt to, I will quote your reply in an
encrypted message.
--citation ends--


I don't recall having an option to restrict my key as a "signing-only"
key.  The key manager shows no apparent distinction about that.

For info about Adele, see: https://tinyurl.com/ww2tjfd

  ..and scroll down to,

 "Practice with Adele, the friendly OpenPGP email robot"


 ../|ug

--- Thunderbird 2.0.0.24 (Windows/20100228)