Script error: the <a href="https://www.ioncube.com">ionCube</a> Loader for PHP needs to be installed.

The ionCube Loader is the industry standard PHP extension for running protected PHP code,
and can usually be added easily to a PHP installation.

For Loaders please visit <a href="https://get-loader.ioncube.com">get-loader.ioncube.com</a> and for an instructional video please see <a href="http://ioncu.be/LV">http://ioncu.be/LV</a> 

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<b>Fatal error</b>:  Uncaught Error: Call to undefined function is_user_logged_in() in /home/pinapa/domains/pinapartner.ir/public_html/wp-content/plugins/wp-fastest-cache/inc/cache.php:823
Stack trace:
#0 [internal function]: WpFastestCacheCreateCache-&gt;callback()
#1 /home/pinapa/domains/pinapartner.ir/public_html/wp-includes/functions.php(5471): ob_end_flush()
#2 /home/pinapa/domains/pinapartner.ir/public_html/wp-includes/class-wp-hook.php(324): wp_ob_end_flush_all()
#3 /home/pinapa/domains/pinapartner.ir/public_html/wp-includes/class-wp-hook.php(348): WP_Hook-&gt;apply_filters()
#4 /home/pinapa/domains/pinapartner.ir/public_html/wp-includes/plugin.php(517): WP_Hook-&gt;do_action()
#5 /home/pinapa/domains/pinapartner.ir/public_html/wp-includes/load.php(1304): do_action()
#6 [internal function]: shutdown_action_hook()
#7 {main}
  thrown in <b>/home/pinapa/domains/pinapartner.ir/public_html/wp-content/plugins/wp-fastest-cache/inc/cache.php</b> on line <b>823</b><br />