This is the SDK developed by
@DonManfred. You need to add the Dropbox SDK. Thanks DonManfred
Check the dropboxV2.xml file in the additional library.
You should have this at the end of the file.
<version>0.6</version>
<comment>The Dropbox library allows you to communicate with Dropbox</comment>
<author>DonManfred (wrapper)</author>
<dependsOn>dropbox-core-sdk-5.2.0</dependsOn>
<-- Version of dropbox you are using
<dependsOn>jackson-core-2.7.4</dependsOn>
Make sure the Dropbox SDK version matches this line. Otherwise, modify it with your SDK version.
In my additional libraries folder, I have this.
dropbox-core-sdk-5.2.0.jar
DropboxV2.jar
DropboxV2.xml
jackson-core-2.7.4.jar
If you have all of this in your additional library folder, then there is another problem.
Please check your configuration