formatError currently will return AuthApiError with xhr property set to TypeError object.
generateIdxAction will try to parse xhr as JSON and will trigger error SyntaxError: "undefined" is not valid JSON
You can reproduce with SIW playground with mock authenticator-enroll-select-authenticator-with-skip having incorrect url http://localhost:3000:1802/idp/idx/cancel. Clicking on Back to sign in will trigger error SyntaxError: "undefined" is not valid JSON instead of OAuthError: Failed to execute 'fetch' on 'Window': Failed to parse URL from http://localhost:3000:1802/idp/idx/cancel
fetchcan throw exceptions: https://developer.mozilla.org/en-US/docs/Web/API/fetch#exceptionsformatError currently will return
AuthApiErrorwithxhrproperty set toTypeErrorobject. generateIdxAction will try to parsexhras JSON and will trigger errorSyntaxError: "undefined" is not valid JSONYou can reproduce with SIW playground with mock authenticator-enroll-select-authenticator-with-skip having incorrect url
http://localhost:3000:1802/idp/idx/cancel. Clicking onBack to sign inwill trigger errorSyntaxError: "undefined" is not valid JSONinstead ofOAuthError: Failed to execute 'fetch' on 'Window': Failed to parse URL from http://localhost:3000:1802/idp/idx/cancelIssue for SIW: OKTA-668419