“Got Stuck” loop. PHP 8 related?

Hi there,

I have about 40 clients that all use this plugin. Last month, I updated them all to PHP 8. This month, this plugin’s scan fails on all of them. Each one gets to 99% and gets in the “Got Stuck” loop during DB scans.

I contacted my host, who provided the following error log:

(server path redacted)

[18-Jan-2022 17:53:48 UTC] PHP Fatal error:  Uncaught TypeError: preg_match_all(): Argument #2 ($subject) must be of type string, array given in [server path here]/plugins/gotmls/images/index.php:869
Stack trace:
#0 [server path here]/plugins/gotmls/images/index.php(869): preg_match_all()
#1 [server path here]/plugins/gotmls/images/index.php(1270): GOTMLS_preg_match_all()
#2 [server path here]/plugins/gotmls/index.php(1540): GOTMLS_db_scan()
#3 [server path here]/wp-includes/class-wp-hook.php(303): GOTMLS_ajax_scan()
#4 [server path here]/wp-includes/class-wp-hook.php(327): WP_Hook->apply_filters()
#5 [server path here]/wp-includes/plugin.php(470): WP_Hook->do_action()
#6 [server path here]/wp-admin/admin-ajax.php(187): do_action()
#7 {main}
  thrown in [server path here]/plugins/gotmls/images/index.php on line 869

Is this a known error? Is this related to my upgrade to PHP 8?