Error 86 causes update failure

Press Ctrl + Shift + Esc to open the Task Manager

Navigate to the Processes tab.

Locate and right-click the reported app on the list.

Select End Task to close this application.

Select Retry to download the Creative Cloud app again.

In the Finder, select Go > Utilities.

Double-click Activity Monitor.

From the menu bar, select View > All Processes.

In the search box, type the name of the process you want to close.

Double-click the conflicting process from the list and select Quit. 

If prompted, select Force Quit to end the selected process.

Repeat steps 4 to 6 for any additional conflicting processes.

Select Retry to update the Creative Cloud app again.