Ensure that the EA is permitted to trade on your platform:

Go to the “Tools” tab, select “Options” then “Expert Advisors” and check if the “Allow Automated Trading” feature is switched on.

If the EA has been successfully activated then there’s should be a smiley face on the top-right corner of your chart.

If the EA is still not working then you should check for any errors in the log files in the ‘Experts’ tab.

For further assistance, please refer to the EA provider or the MQL4 community forum.