Fatal error in Logging Utility class

I’m experiencing a fatal error when visiting the Subscribers & Tools pages:

Fatal error: Uncaught Error: Call to a member function is_writable() on bool in wp-content/plugins/popup-maker/classes/Utils/Logging.php:83 
Stack trace: 
#0 wp-content/plugins/popup-maker/classes/Utils/Logging.php(65): PUM_Utils_Logging->__construct() 
#1 wp-content/plugins/popup-maker/classes/DB/Subscribers.php(126): PUM_Utils_Logging::instance() 
#2 wp-content/plugins/popup-maker/classes/Abstract/Database.php(58): PUM_DB_Subscribers->create_table() 
#3 wp-content/plugins/popup-maker/classes/Abstract/Database.php(118): PUM_Abstract_Database->__construct() 
#4 wp-content/plugins/popup-maker/classes/Admin/Subscribers/Table.php(75): PUM_Abstract_Database::instance() 
#5 wp-content/plugins/popup-maker/classes/Admin/Subscribers.php(30): PUM_Admin_Subscribers_Table->prepare_item in wp-content/plugins/popup-maker/classes/Utils/Logging.php on line 83

I am running WP 6.3.2 and Popup Maker 1.18.2. I have Settings > Misc > Disable asset caching checked.

It looks like there may be an issue with the code in wp-content/plugins/popup-maker/classes/Utils/Logging.php:119 as it returns a boolean value of false when the conditional evaluates to false.