Revolution Slider not working with PHP 7.0

Hello

I tried to migrate the PHP libraries to PHP 7.0 because the security monitor notified me that the PHP 5.6 no longer supported since Feb 2017.

When I switched to V 7.0 the website go off showing the error below:

Fatal error: Uncaught Error: Call to undefined function mysql_error() in /homessd/tenzi/public_html/wp-content/plugins/revslider/inc_php/framework/db.class.php:29 Stack trace: #0 /homessd/tenzi/public_html/wp-content/plugins/revslider/inc_php/framework/db.class.php(127): UniteDBRev->checkForErrors(‘fetch’) #1 /homessd/tenzi/public_html/wp-content/plugins/revslider/inc_php/revslider_params.class.php(42): UniteDBRev->fetch(‘tz_revslider_se…’) #2 /homessd/tenzi/public_html/wp-content/plugins/revslider/inc_php/revslider_operations.class.php(1070): RevSliderParams->getFieldFromDB(‘general’) #3 /homessd/tenzi/public_html/wp-content/plugins/revslider/settings/general_settings.php(41): RevOperations::getGeneralSettingsValues() #4 /homessd/tenzi/public_html/wp-content/plugins/revslider/inc_php/framework/base_admin.class.php(343): require(‘/homessd/tenzi/…’) #5 /homessd/tenzi/public_html/wp-content/plugins/revslider/revslider_admin.php(56): UniteBaseAdminClassRev::requireSettings(‘general_setting…’) #6 /homessd/tenzi/public_h in /homessd/tenzi/public_html/wp-content/plugins/revslider/inc_php/framework/db.class.php on line 29