Fix certificate template
please follow this video carefully and create a new certificate template form the start follwing below:
please make sure that you click the add text/image button or edit text/image button in the end <<<--- this is the key point of saving it .after this please make sure you hit the save button at the top right
After generating this new tmeplate make sure you select the template in course settings : https://screenpal.com/i/c0ioIJVgMCg
and after selecting template re-assign certificate to user and then check it : https://screenpal.com/i/c0ioIJVgMCg