Issue Summary

When using an "Internal Integration Secret" from Notion that starts with "ntn_", the Confluence Importer throws "Couldn’t upload file" error message.

Steps to Reproduce

1. Attempt to import data from Notion into Confluence, as per the steps described here.
2. In the Transfer users section, you might get an error message like this "We weren’t able to connect to Notion automatically. Try adding a token."
3. Click on the Add an integration token button;
4. Follow the steps to generate a new integration token and paste it in the "Add an integration token", once done, click on the Submit button.
   • Note the integration token starts with "ntn_".
5. Back to the Transfer users page, click on the Next button.
6. In the Set up spaces, choose "Default space permission".
7. Click on the Next button.
8. In the Review summary page, click on the Start import button.

Expected Results

The content from Notion is successfully imported into Confluence Cloud.

Actual Results

Confluence throws the following error message:

Couldn’t upload file
Something went wrong while we were trying to upload your file. Please wait a few minutes and try again.

Workaround

Currently, there is no known workaround for this behavior. A workaround will be added here when available