Octopus API Key issue / error (FIXED)

When trying to enter my Octopus smart tarrif details i have found an error (and solution) that stops it submitting.

API key supplied by octopus is shown as "Your API key is: sk_live_dv38q0***********kP48" (redacted)

Thr key you need to enter intonthe portal needs to include a colon on the end ":" so the key to enter in my case was
"sk_live_dv38q0***********kP48:"

Works fine if you include the colon, i think this is used in some programming languages as an "end of line" or "next line" but no idea if thats the actual issue here.

Thanks! Just had exactly the same issue - you have saved me hours of wondering what I might have done wrong 🙂