The Throttling option within Central Administration does not show any web applications.
If, when enabling the Throttling for the CorasWorks web parts, you do not see anything under the title line, you have run into a problem of NULL values within your Central Administration's Web Config Modification Collection within the SharePoint Central Database. When the Central Configuration or display components attempted to read these NULL values, they stopped working and reported an error message.
In general, the Web Config Modification Collection should not contain any NULL entries and components built to read from the collection will run into similar problems unless they are coded to route around these entries. To overcome this issue, the Installation Manager includes a pair of tools that identify whether the Collection has NULL values and, once discovered, removes them from the appropriate SharePoint Web Application.