Unexpected token < in JSON at position 1

SyntaxError: Unexpected token < in JSON at position 1
    at JSON.parse (<anonymous>)
    at parseJSONFromBytes (node:internal/deps/undici/undici:4747:19)
    at successSteps (node:internal/deps/undici/undici:4718:27)
    at fullyReadBody (node:internal/deps/undici/undici:1433:9)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async specConsumeBody (node:internal/deps/undici/undici:4727:7)
    at async /var/task/netlify/functions/index.js:159331:18