yes
i update to 3.7.4

i change php version to 5.6 and solve problem
but in php version 7.1 problem is still

Dear ahmad

The current our template use very many $this prntscr.com/g9vut6
stackoverflow.com/questions/13269477/fatal-error-using-this-when-not-in-object-context-in-joomla
stackoverflow.com/questions/2597914/php-fatal-error-using-this-when-not-in-object-context-joomla
it is not support for php7.x now
Please use php5.6 for this template. We are updating all the template for joomla 3.7. so we will update it for php7 in the next time.

thanks