Unexpected token 'e', "error code: 1016" is not valid JSON

SyntaxError: Unexpected token 'e', "error code: 1016" is not valid JSON
    at async fetcher$1 (functionsWorker-0.1934667529547689.js:3603:16)
    at async Object.assign.s (functionsWorker-0.1934667529547689.js:1813:24)