- goto C:\Program Files (x86)\Common Files\Adobe\ folder
It should be only 1 folder in it named [Acrobat] - (if you have acrobat reader installed)
I find a dubious folder named [AdobeGCClient]
It contained 2 dubious executable files in it:
AGM = adobe Genuine Manager and AGS = adobe genuine source
They can not be deleted because they run as services in the background.
So... I stopped these specific services, and inside that folder, i could delete the 2 executable files.
Now PS is working.
Always restart PC to confirm your PS is working fine.

Clean your temp folder:
go to C:\Users\[PCname]\AppData\Local\Temp\ folder and delete ALL files from it and skip for possible used files.
Open PS and all should work now.

I had same issue - MacOS 10.14.3 and Adobe 2019.010.20091. Spent weeks looking for an answer, uninstalling and reinstalling countless times, nothing worked... Until I followed the following steps:

1. https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html
2.

You have to go to user > Library > Caches
and
System > Library > Caches.
and erase all files and folders in the Caches folders (I only deleted Adobe and Acrobat ones).
Attention: After that your System has to set up new Caches, this takes a while and your system is slow. Once the caches are rebuild the system is working normal again.

Restart after each of the steps.

3. Install Creative Cloud
4. Install Adobe Acrobat DC

This worked for me.

Good luck!

We are really sorry for the problem faced by you. In order to resolve this issue please provide us more details:

1. Are you on Win/Mac platform
2. Win/Mac OS version
3. Acrobat Version
4. Is this activation key is Volume or Retail
5. Please elaborate the exact steps you are performing

Exactly the same thing has been happening to me. But I can open the apps with no problem. What's going in?

Still happening. Reinstall does nothing. But hey, keep hiking the price up for Creative Cloud!

It's really sad to hear about. In order to resolve this problem could you provide us the following details:

1. Are you on Win/Mac platform
2. Win/Mac OS version
3. Acrobat Version
4. Is this activation key is Volume or Retail
5. Please elaborate the exact steps you are performing

Same is happening to me. I've had the cloud for a couple years now. On a mac. I've uninstalled the entire cloud suite, and redownloaded. I only use acrobat, illustrator, photoshop. I've tried to uninstall and reinstall acrobat several times and still get this error when trying to open the program. My cloud says I have the most up to date version of the reader so I'm at a loss what to do.

Sorry about your problem. Please let us know the following answers to help isolate the root cause of the issue:
1) Whether you are on Mac or Windows and the Acrobat version on your machine?
2) Also if you have Creative Cloud installed on your machine and what all Adobe products are installed?