Hello there! follow the steps below to fix your Photoshop error
Quit all Adobe applications.
open a folder
then from the top menu bar select the go option
hold down the option key on your keyboard
you will see a library icon when holding the option key
select the library icon
then look for a folder called prefrences
inside this folder look for Flexnet publisher
Delete the Flexnet publisher folder
then empty trash and open Photoshop elements.
ok move the whole prefrences folder to your desktop
then click the apple icon and select restart/reset
Ok go to the library folder then look for a folder callled application support. Inside there should be a folder named Flexnext Publisher. Delete it then open the link below and run the file that downloads.
a. Double-click the LicenseRecovery111.dmg
Note: Leave this window open and proceed to the next step.
b. Double-click your Hard Drive.
c. Double-click Applications.
d. Double-click Utilities.
e. Double-click Terminal.
f. Type “sudo python “
Note: There is a space following “python”. Do not press Return.
g. Drag LicenseRecoveryLauncher.app from the LicenseRecovery111.dmg window onto the Terminal Window and press Return.
h. enter user name and password.
I. Follow steps on screen.