I can’t reproduce that error. I have tried:
- sending an email without Secrets
- storing the email address as a secret, decrypting, then sending an email to that address
- resetting the encryption key in the Secrets service and sending email
- deleting the Secrets service, attempting to send the secret email
- adding the Secrets service back again and sending email
All of this works as expected.
Can you provide more details, or better yet, a clone link of the application?
Possibly related to the following bug reports: