I have a Creative Cloud subscription for Photoshop CC. All Creative Clouds products are updated to the latest versions. When I tried to install Tony Kuyper's TKActionv3 Photoshop extension using the Adobe Extension Manager CC on my PC desktop, I received an error message the extension contained an invalid signature and wouldn't be installed. I had previously installed the extension on my laptop without any problems. At the same time, I also noticed the default installed Photoshop CC extensions (e.g., Adobe Exchange, Kuler, Mini Bridge, Behance) could not be loaded using the Windows/Extension command. I receive an error message that the command could not be completed because the extension could not be loaded. After contacting Tony Kuyper, he suggested that I try the steps mentioned in the following weblink: https://forums.adobe.com/message/6029768. The steps basically consist of uninstalling and reinstalling all the Creative Cloud apps associated with Photoshop CC. I tried the steps multiple times, but I am still having the same problems. I can find the default installed Photoshop CC extensions on my machine, so I don't know why they can't be loaded.
I posted this question in the Extension Manager group. Should I also post it in the Adobe Photoshop group?
Thanks for your assistance,
Mark Curtis