What was reported:
Issue fastly/cli#1880 (closed, 8 comments): <!-- **Note**: Please keep in mind that if your issue requires troubleshooting that will require any details that you aren't comfortable disclosing in this public forum (such as service IDs), you will need to open a Fastly support ticket instead: https://support.fastly.com. Bug reports opened here: - Do not have an SLA - Should not be a duplicate of an existing support ticket that you have already created, or vice versa - May take longer to solve compared to our dedicated support team More details on submitting issues can be found here: https://github.com/fastly/cli/blob/main/ISSUES.md -->...
What works:
[rcaril (maintainer)]: The customsignal create and list CLI errors mean your Fastly Control Panel account is not linked to your NGWAF Corp. Follow the Fastly guide Connecting a Fastly Account to Your Corp to grant API access. Meanwhile, you can hit /ngwaf/v1/workspaces/{id}/signals directly with curl instead of the CLI.