Uncaught Error after saving the GP Premium license code, IP Address blocked?

Hello,
I have exact the same error like this post:
https://generatepress.com/forums/topic/uncaught-error-messeage-after-saving-the-gp-premium-license-code/

This are my details:

Fresh Installed – no other Plugin active
WP 5.7.2.
GP Premium 2.0.2.
Generate Press 3.0.3

/wp-admin/themes.php?page=generate-options

When I put my license key in the Updates form and press Save I get the WordPress Error
There has been a critical error on this website. Please check your site admin email inbox for instructions.

The mail says:

Ein Fehler vom Typ E_ERROR wurde in der Zeile 499 der Datei /mnt/web417/e2/85/59868885/htdocs/STRATO-apps/wordpress_02/app/wp-content/plugins/gp-premium/inc/activation.php verursacht. Fehlermeldung: Uncaught Error: Call to a member function get_error_message() on array in /mnt/web417/e2/85/59868885/htdocs/STRATO-apps/wordpress_02/app/wp-content/plugins/gp-premium/inc/activation.php:499
Stack trace:
#0 /mnt/web417/e2/85/59868885/htdocs/STRATO-apps/wordpress_02/app/wp-includes/class-wp-hook.php(292): generatepress_premium_process_license_key('')
#1 /mnt/web417/e2/85/59868885/htdocs/STRATO-apps/wordpress_02/app/wp-includes/class-wp-hook.php(316): WP_Hook->apply_filters(NULL, Array)
#2 /mnt/web417/e2/85/59868885/htdocs/STRATO-apps/wordpress_02/app/wp-includes/plugin.php(484): WP_Hook->do_action(Array)
#3 /mnt/web417/e2/85/59868885/htdocs/STRATO-apps/wordpress_02/app/wp-admin/admin.php(175): do_action('admin_init')
#4 /mnt/web417/e2/85/59868885/htdocs/STRATO-apps/wordpress_02/app/wp-admin/options.php(19): require_once('/mnt/web417/e2/...')
#5 {main}
  thrown

This is my ip - 81.169.145.150

Can you please help me?

PS
I am using this GP Premium licence on other Websites without a problem like this, maybe a hosting problem?