Trying to buy Photoshop and After Effects but the Apps tab in CC tells me, "download error" with a caution sign behind it. I've tried a lot of things and nothing is working.
Please follow the article: Creative Cloud Help | Download Error in Apps tab of Creative Cloud Desktop Application which will help you to fix the Download error on Creative Cloud Desktop application.
Let us know if this works or not.
I have a similar issue with the apps tab, i've tried deleting those folder mentioned in the article you link, but the issue has not gone away.
I've also tried to re-install creative cloud and the issue is still there.