Request failed for https://public-api.wordpress.com/rest/v1.1/sites/156141865/media/new returned code 400

Hey, guys.

For some reason, my google-docs-add-on can not upload images, regardless of their extension.

The full error message I am getting is:

{"message":"Request failed for https://public-api.wordpress.com/rest/v1.1/sites/156141865/media/new returned code 400. Truncated server response: {\"error\":\"json_syntax\",\"message\":\"Invalid response from the Jetpack site\"} (use muteHttpExceptions option to examine full response).","name":"Exception","fileName":"Code (WordPress.com for Google Docs)","lineNumber":3349,"stack":"\tat Code (WordPress.com for Google Docs):3349 (request)\n\tat Code (WordPress.com for Google Docs):3422 (uploadImage)\n\tat Code (WordPress.com for Google Docs):304 (upload)\n\tat Code (WordPress.com for Google Docs):4083\n\tat Code (WordPress.com for Google Docs):3878 (renderInlineImage)\n\tat Code (WordPress.com for Google Docs):3542 (renderElement)\n\tat Code (WordPress.com for Google Docs):3524 (renderContainer)\n\tat Code (WordPress.com for Google Docs):3655 (renderParagraph)\n\tat Code (WordPress.com for Google Docs):3538 (renderElement)\n\tat Code (WordPress.com for Google Docs):3524 (renderContainer)\n\tat Code (WordPress.com for Google Docs):309 (postToWordPress)\n"}

Cheers.

Start by reproducing the image upload failure and inspect the request at Code line 3349 and uploadImage at line 3422, using the full response rather than the truncated error. Trace the call from renderInlineImage and determine whether the WordPress.com media endpoint returns valid JSON; done means image uploads succeed instead of returning the 400 json_syntax error.

Written by the indexing model from the issue text.