PHP Error

I’ve been getting the following errors in my log files on several sites that I manage. All sites use WooCommerce and are using latest version.
[29-Apr-2021 21:34:31 UTC] PHP Fatal error: Uncaught Error: Cannot use string offset as an array in /home/domain/public_html/wp-content/plugins/cleantalk-spam-protect/cleantalk.php:1593
Stack trace:
#0 /home/domain/public_html/wp-content/plugins/cleantalk-spam-protect/cleantalk.php(183): apbct_store__urls()
#1 /home/domain/public_html/wp-settings.php(391): include_once(‘/home/domain/…’)
#2 /home/domain/public_html/wp-config.php(91): require_once(‘/home/domain/…’)
#3 /home/domain/public_html/wp-load.php(37): require_once(‘/home/domain/…’)
#4 /home/domain/public_html/wp-blog-header.php(13): require_once(‘/home/domain/…’)
#5 /home/domain/public_html/index.php(17): require(‘/home/domain/…’)
#6 {main}
thrown in /home/domain/public_html/wp-content/plugins/cleantalk-spam-protect/cleantalk.php on line 1593`