`circleci config validate` failing (`failed to decode body: invalid character 'I'`)

CircleCI - ## Meta: CircleCI CLI Version: Observed on both: - 0.1.25725+63309c6 (release) - 0.1.25725+63309c6 (homebrew) Operating System: - Ubuntu 22.04.1 LTS - macOS Monterey 12.6.2 (21G320) CircleCI CLI Diagnostic: <!--- You can run circleci diagnostic locally in your terminal to return your diagnostic information.

The fix

That cryptic JSON error is hiding a plain message: the response body starts with 'Invalid API token', and the decoder chokes on the letter I. Regenerate your CircleCI personal API token and rerun setup.

Thread: gh:CircleCI-Public/circleci-cli#904

In gh:CircleCI-Public/circleci-cli#904 (https://github.com/CircleCI-Public/circleci-cli/issues/904), the issue reported: ## Meta: CircleCI CLI Version: Observed on both: - 0.1.25725+63309c6 (release) - 0.1.25725+63309c6 (homebrew) Operating System: - Ubuntu 22.04.1 LTS - macOS Monterey 12.6.2 (21G320) CircleCI CLI Diagnostic: <!--- You can run circleci diagnostic locally in your terminal to return your diagnostic information. --> ``` --- CircleCI CLI Diagnostics --- Debugger mode: false Config found: [HOME]/... API host: https://circleci.com API endpoint: graphql-unstable OK, got a token. Trying an introspection query on API... Ok. Hello, Scott Ouellette. The verified answer: That cryptic JSON error is hiding a plain message: the response body starts with 'Invalid API token', and the decoder chokes on the letter I. Regenerate your CircleCI personal API token and rerun setup.