Fatal error: Uncaught Error: Call to undefined function ai1wm_is_filesize

Hi,

I can’t login on the admin page. I didn’t claim anything, I just wanted to enter. I run a webshop, so this is a big problem and I need urgent help. I am subscribed to the All in One WP migration unlimited extension plugin. Can anyone help?

Fatal error: Uncaught Error: Call to undefined function ai1wm_is_filesize_supported()
in /home/petbuddy/public_html/wp-content/plugins/all-in-one-wp-migration/lib/model/class-ai1wm-backups.php on line 54

Call stack:

1. Ai1wm_Backups::get_files()
   wp-content/plugins/all-in-one-wp-migration/lib/model/class-ai1wm-backups.php:94
2. Ai1wm_Backups::count_files()
   wp-content/plugins/all-in-one-wp-migration/lib/controller/class-ai1wm-main-controller.php:658
3. Ai1wm_Main_Controller::admin_menu()
   wp-includes/class-wp-hook.php:308
4. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:332
5. WP_Hook::do_action()
   wp-includes/plugin.php:517
6. do_action()
   wp-admin/includes/menu.php:155
7. require_once()
   wp-admin/menu.php:420
8. require()
   wp-admin/admin.php:158
9. require_once()
   wp-admin/index.php:10

The page I need help with: [log in to see the link]