I have purchased and installed the plugin and attempted to load the license, I get the following error message:

WordPress has a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.

In this case, WordPress caught an error with one of your plugins, Easy Appointments Connect.

First, visit your website (https://nettech.com/) and check for any visible issues. Next, visit the page where the error was caught (https://nettech.com/wp-admin/admin.php?page=easy_app_connect_license) and check for any visible issues.

Please contact your host for assistance with investigating this issue further.

If your site appears broken and you can't access your dashboard normally, WordPress now has a special "recovery mode". This lets you safely login to your dashboard and investigate further.

https://nettech.com/wp-login.php?action=enter_recovery_mode&rm_token=5qyE7zv8lb9ShGEgnPoZH5&rm_key=hnZdXocm2Fzl7dKh9X0gHx

To keep your site safe, this link will expire in 1 day. Don't worry about that, though: a new link will be emailed to you if the error occurs again after it expires.

When seeking help with this issue, you may be asked for some of the following information:
WordPress version 6.9.4
Active theme: Blocksy (version 2.1.35)
Current plugin: Easy Appointments Connect (version 1.2.13)
PHP version 8.4.18



Error Details
=============
An error of type E_ERROR was caused in line 1018 of the file /var/web/site/public_html/wp-content/plugins/easy-appointments-connect/main.php. Error message: Uncaught Error: Call to a member function get_container() on null in /var/web/site/public_html/wp-content/plugins/easy-appointments-connect/main.php:1018
Stack trace:
#0 /var/web/site/public_html/wp-includes/class-wp-hook.php(341): EasyAppointmentsConnect->connect_license_page('')
#1 /var/web/site/public_html/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters('', Array)
#2 /var/web/site/public_html/wp-includes/plugin.php(522): WP_Hook->do_action(Array)
#3 /var/web/site/public_html/wp-admin/admin.php(264): do_action('admin_page_easy...')
#4 {main}
  thrown

I changed themes - same thing
I disabled most of my other plugins - same thing. Very unhappy.