On February 12th 2015 we announced a series of changes to our developer program. These changes have now begun to take affect and will be rolled out to the entire LinkedIn application base between May 12th - May 19th, 2015.
Please read through this guide for more information about what has changed and some helpful troubleshooting tips if you are experiencing errors with your LinkedIn API integration.
If you are an existing LinkedIn partner, these changes will not impact your existing partnership or the associated APIs that your partnership allows you to access.
If you are experiencing issues as a result of the May 12th changes, please reach out to your LinkedIn Business Development representative immediately.