Invalid argument supplied for foreach()

[void285]

I noticed this plugin is updated 2 years ago, I guess wordpress API change cause the following error.

Warning: Invalid argument supplied for foreach() in \wp-content\plugins\qm-memcache-stats\classes\QM_Output_Memcache_Stats.php on line 29

Warning: Invalid argument supplied for foreach() in \wp-content\plugins\qm-memcache-stats\classes\QM_Output_Memcache_Stats.php on line 36

Warning: Invalid argument supplied for foreach() in \wp-content\plugins\qm-memcache-stats\classes\QM_Output_Memcache_Stats.php on line 42