PHP warning in the litespeed plugin

[06-Aug-2018 10:47:58 UTC] PHP Warning: array_merge(): Argument #1 is not an array in /home/sergiala/blog.sergialarconrecio.com/wp-content/plugins/litespeed-cache/admin/litespeed-cache-admin-settings.class.php on line 170
[06-Aug-2018 10:47:58 UTC] PHP Stack trace:
[06-Aug-2018 10:47:58 UTC] PHP 1. {main}() /home/sergiala/blog.sergialarconrecio.com/wp-admin/options.php:0
[06-Aug-2018 10:47:58 UTC] PHP 2. update_option() /home/sergiala/blog.sergialarconrecio.com/wp-admin/options.php:274
[06-Aug-2018 10:47:58 UTC] PHP 3. sanitize_option() /home/sergiala/blog.sergialarconrecio.com/wp-includes/option.php:297
[06-Aug-2018 10:47:58 UTC] PHP 4. apply_filters() /home/sergiala/blog.sergialarconrecio.com/wp-includes/formatting.php:4314
[06-Aug-2018 10:47:58 UTC] PHP 5. WP_Hook->apply_filters() /home/sergiala/blog.sergialarconrecio.com/wp-includes/plugin.php:203
[06-Aug-2018 10:47:58 UTC] PHP 6. LiteSpeed_Cache_Admin_Settings->validate_plugin_settings() /home/sergiala/blog.sergialarconrecio.com/wp-includes/class-wp-hook.php:288
[06-Aug-2018 10:47:58 UTC] PHP 7. LiteSpeed_Cache_Admin_Settings->_validate_singlesite() /home/sergiala/blog.sergialarconrecio.com/wp-content/plugins/litespeed-cache/admin/litespeed-cache-admin-settings.class.php:95
[06-Aug-2018 10:47:58 UTC] PHP 8. array_merge() /home/sergiala/blog.sergialarconrecio.com/wp-content/plugins/litespeed-cache/admin/litespeed-cache-admin-settings.class.php:170

I have made the modification that you tell me in the link and it works, now it does not give the error. I hope that this error is solved in the next updates so that everyone who has the problem is solved since changing the parameter works.