As announced on their blog, Adobe have made some changes to Creative Cloud apps.
Starting now, you will only be able to download the last two versions of Adobe CC applications, there will be no accessto older versions of CC applications as before:
Adobe always recommend that all Creative Cloud users update their applications to the latest versions and as part of this recommendation, they’re introducing these new changes.
As Adobe are saying about these new changes:
Focusing our efforts on the latest two major releases of Creative Cloud applications, which the vast majority of Adobe customers are already using, will further enable us to develop the features and functionality most requested by customers and ensure peak performance and benefits across Windows and Mac operating systems.
So from now, you can only download the last two versions of CC applications, for example: Photoshop versions 19. and 20. or Lightroom 7. and 8.
Here’s the link to Adobe article.