Not authorised to send Apple events to System Events. (-1743)

I have a Script that I run as an application (see below) it worked for the last +5 years.  

After upgrading to 10.15 from 10.13 I get the following error.

Not authorised to send Apple events to System Events.

Not authorised to send Apple events to System Events. (-1743)

I looked on the internet but don not seem to be able to find a solution to this problem.  Anybody know how to fix this? 

tell application "System Events"
       tell application "Microsoft Outlook" to activate
       tell application "Microsoft Outlook"
              if it is running then
                      activate
              end if
              tell application "System Events"
                      keystroke (ASCII character 107) using control down & command down
              end tell
       end tell
end tell