Wrota an Automator app that sends chat messages for debugging purposes. It has the following Apple Script

on run {input, parameters}
    repeat with i from 1 to 30
        set message to "This is message #" & i
        do shell script "osascript -e 'tell application "System Events" to keystroke "" & message & ""'"        
        do shell script "osascript -e 'tell application "System Events" to key code 36'" -- Press Enter/Return key
        delay 0.1 -- Adjust the delay if necessary
    end repeat
    return input
end run

I gave it Accessibility permissions. After a couple of runs it fails with the following error

The action “Run AppleScript” encountered an error: “36:66: execution error: System Events got an error: osascript is not allowed to send keystrokes. (1002)”

What can I do so that macOS lets me run the script?