Critical error in legacy engine

I confirm the error which occurs after upgrading to 8.1.0 and looks similar to this one:
I am using an openstreet map
<https://ww.wp.xz.cn/support/topic/fatal-error-uncaught-exception-24/&gt;

My error messages:

WordPress version 5.5.3
Thème actuel : BuddyX (version 3.6.0)
Extension actuelle : WP Google Maps (version 8.1.0)
PHP version 7.3.25

Détails de l’erreur
======================
Une erreur de type E_ERROR a été causée dans la ligne 5 du fichier /htdocs/wp-content/plugins/wp-google-maps/includes/class.settings-page.php. Message d’erreur : Uncaught Error: Class ‘WPGMZA\Page’ not found in /htdocs/wp-content/plugins/wp-google-maps/includes/class.settings-page.php:5
Stack trace:
#0 /htdocs/wp-content/plugins/wp-google-maps/legacy-core.php(13): require_once()
#1 /htdocs/wp-content/plugins/wp-google-maps/includes/class.plugin.php(14): wpgmza_require_once(‘/htdocs/wp-cont…’)
#2 /htdocs/wp-content/plugins/wp-google-maps/legacy-core.php(13): require_once(‘/htdocs/wp-cont…’)
#3 /htdocs/wp-content/plugins/wp-google-maps/legacy-core.php(27): wpgmza_require_once(‘/htdocs/wp-cont…’)
#4 /htdocs/wp-content/plugins/wp-google-maps/wpGoogleMaps.php(1497): require_once(‘/htdocs/wp-cont…’)
#5 /htdocs/wp-settings.php(377): include_once(‘/htdocs/wp-cont…’)
#6 /htdocs/wp-config.php(101): require_once(‘/htdocs/wp-sett…’)
#7 /htdocs/wp-load.php(37): require_once(‘/htdocs/wp-conf…’)
#8 /htdocs/wp-admin/admin.php(34): require_once(‘/htdocs/wp-load…’)
#9 /htdocs/wp-admin/plugins.php(10): require_once(‘/htdocs/wp-admi…’)
#10 {main}

Thanks a lot Nick, Good job !