Sendinblue API key v3?

Replies: 0

I have been following this tutorial to the letter. Helpfully, I am using both Sendinblue and my host is Bluehost, so the entire tutorial is applicable to me.

However, I am getting this error log when sending a test email:

Versions:
WordPress: 5.8
WordPress MS: No
PHP: 7.4.22
WP Mail SMTP: 3.0.3

Params:
Mailer: sendinblue
Constants: No
API Key: Yes

Debug:
Email Source: WP Mail SMTP
Mailer: Sendinblue
[unauthorized]: Key not found

I have authorised my domain and all three records have validated.

I did, however find it strange that the API key that Sendinblue provides me begins with a bunch of asterisks… It’s like it is hiding the real key from me. Is it because I have a free version of Sendinblue?