Why do I get an 404 Invalid redirect_uri when using my own App?

Description

This error suggest that the OAuth redirect URIs in your own Dropbox App configuration doesn't match the redirect url required by the plugin. the 

Solution

1. Go to the tab Advanced ->API Application -> Use Custom App on the plugin options page.
2. Copy the OAuth 2.0 Redirect URI value.
3. Go to your Dropbox App console.
4. Configure your App, and paste the copied value in the Redirect URIs field in the settings section of your app.
5. Save the configuration.

Note
The OAuth redirect url has changed in the past, so check the current redirect url as shown on the plugin settings page: tab Advanced ->API Application -> Use Custom App.