Plugin not working

Hello,
I installed your plugin and viewed my page and got these errors.

Warning: arsort() expects parameter 1 to be array, boolean given in …/wp-content/plugins/recent-searches/main.php on line 138

Warning: array_slice() expects parameter 1 to be array, boolean given in …/wp-content/plugins/recent-searches/main.php on line 139

Warning: Invalid argument supplied for foreach() in …/wp-content/plugins/recent-searches/main.php on line 142

The …/ is my actual path and I am not including that for security reasons. Just fyi.

Look forward to your response.

Best,
Karl

https://wordpress.org/plugins/recent-searches/