When making changes to the web template https://agroforestalycinegetica.com/administrator/index.php
I have the same error that we have treated on the web http://podologomanuelchamorro.es/administrator/index.php
I tried to apply this solution to the template http://answers.themler.io/articles/173620/how-to-fix-the-error-after-updating-to-joomla-3-9 but it has not worked.
I ask you, please, to help me solve the problem.
I have attached the file whit template that we have saved
Receive an cordial greeting. Elviro