Unable to upload the file using fastlane CI integration

It sounds like you're using a third party library for connecting to Dropbox. Since that's made by a third party, we can't provide any support for the library itself. If you're having any trouble with the library, I recommend referring to its documentation or contacting its developers.

If you're having any trouble with the Dropbox API itself, we'll be happy to help, but we'd need some more information. In that case, please reply with:

• the steps you're taking to reproduce the issue
• the API request and response (make sure to redact your access token though)
• any other unexpected result (e.g., if you're looking somewhere on the Dropbox web site and don't see the expected file)