Creative Cloud Charts (Preview) was introduced in the June 2015 release of Illustrator CC as a technology preview to gather real-world feedback from customers on the new service. Based on customer feedback, the Illustrator team has decided to pause Charts and revisit the design of the feature.
Refer to this FAQs document for more information:
Prior to November 30, 2015 you can access the Chart data by selecting the Chart in your Illustrator document, and clicking on the Edit in Creative Cloud button. Once in the Creative Cloud Charts service in the browser, go to the Data tab. You can copy the data from here to a spreadsheet which you can save to your desktop.
After November 30, 2015 you can go to assets.adobe.com, log in to your Creative Cloud account. Select Libraries from the menu on the left, and then select Charts. From here you can navigate to the charts that you’ve created using Creative Cloud Charts.
Technology Previews are services and features in Creative Cloud that we’re releasing publicly before they’re complete. Not to be confused with “betas” (features or new products that are complete but not fully tested), Technology Previews are intentionally “unfinished.” In other words, the features are fully tested and supported, but we’re still perfecting their capabilities; “previewing” the technology gives Creative Cloud members the opportunity to trial the functionality and give feedback to the product teams—who use the information to further shape the development of the features.
Technology Previews are intentionally “unfinished” because we’re still perfecting their capabilities and looking for feedback from Creative Cloud members. The feedback from members will be used to inform future development of these technologies, and in some cases that may mean that we need to go back to the drawing board.