There are no more updates for new camera RAW files or OS compatibility.
Many third-party sellers offer keys that were never authorized for resale or were part of a now-defunct volume license. Installation Failure: lightroom 6.14 license key
If you need a legal, affordable option:
Given the difficulty of maintaining Lightroom 6.14, consider these modern "one-time purchase" or free alternatives: There are no more updates for new camera
Lightroom 6.14 is a version of Adobe's popular image editing software that was released in 2017. This update brought several new features and improvements, including enhanced performance, new camera support, and bug fixes. With Lightroom 6.14, users can enjoy a wide range of tools and features, including: including enhanced performance