Error in function.php

I have below message for error and unable to login in wp-admin:

Error Details
=============
An error of type E_ERROR was caused in line 52 of the file /home/dailytech/public_html/wp-content/themes/newscard/functions.php. Error message: Uncaught Error: Call to undefined function returner() in /home/dailytech/public_html/wp-content/themes/newscard/functions.php:52
Stack trace:
#0 /home/dailytech/public_html/wp-includes/class-wp-hook.php(287): newscard_setup(”)
#1 /home/dailytech/public_html/wp-includes/class-wp-hook.php(311): WP_Hook->apply_filters(NULL, Array)
#2 /home/dailytech/public_html/wp-includes/plugin.php(478): WP_Hook->do_action(Array)
#3 /home/dailytech/public_html/wp-settings.php(518): do_action(‘after_setup_the…’)
#4 /home/dailytech/public_html/wp-config.php(90): require_once(‘/home/dailytech…’)
#5 /home/dailytech/public_html/wp-load.php(37): require_once(‘/home/dailytech…’)
#6 /home/dailytech/public_html/wp-login.php(12): require(‘/home/dailytech…’)
#7 {main}
thrown

Please update me how can i solve it.

Thanks

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