Error when inputting a page that has an uploaded cover image

Whenever I try to get the HTML of a page with no cover or cover from Unsplash, everything works correctly. The moment I upload my own cover, I get

A server error has occurred
FUNCTION_INVOCATION_FAILED

When I look into the Vercel log, I get:

[GET] /?id=Page-with-a-custom-cover-65f2a5a62d7344768e95cfa91b423618
10:44:58:94
2022-01-29T09:45:01.776Z    1e9b4de1-f8c6-409f-a7f1-09860b5d1548    ERROR   Uncaught Exception  {"errorType":"SyntaxError","errorMessage":"Unexpected token P in JSON at position 0","stack":["SyntaxError: Unexpected token P in JSON at position 0","    at JSON.parse (<anonymous>)","    at IncomingMessage.<anonymous> (/var/task/node_modules/notion-page-to-html/dist/utils/usecases/http-get/node-http-get.js:71:44)","    at IncomingMessage.emit (events.js:412:35)","    at endReadableNT (internal/streams/readable.js:1334:12)","    at processTicksAndRejections (internal/process/task_queues.js:82:21)"]}
Unknown application error occurred

I've deployed this app on https://notion-to-html.vercel.app/, I've been testing it with this Notion database - no-cover page and Unsplash cover page work, custom cover does not. Thank you for this amazing extension, I hope we can find a solution, I'll gladly follow up with further information if needed.

asnunes / notion-page-to-html

Error when inputting a page that has an uploaded cover image #23