Process Dashboard 2.6.9 introduced the ability to use cloud storage (such as OneDrive, Google Drive, DropBox, and others) for team collaboration.
Your team leader has enabled this feature, and has migrated your project to use cloud storage.
Unfortunately, you are running an older version of the Process Dashboard that cannot read data from cloud storage. You must upgrade the Process Dashboard if you wish to continue participating on the project. Until you upgrade, you will not be able to export your data or sync/edit the WBS.
Please contact your team leader for assistance.