I installed your theme earlier today and tested on a staging site and all was fine. I have now tried to do the same on my live site and I have been locked out of my wp admin panel with this message: The site is experiencing technical difficulties. Please check your site admin email inbox for instructions.

I also received the following email from Wordpress:

Howdy!

Since WordPress 5.2 there is 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 your theme, TheGem.

First, visit your website (https://designeracorn.com/) and check for any visible issues. Next, visit the page where the error was caught (https://designeracorn.com/wp-admin/customize.php?theme=thegem&return=https%3A%2F%2Fdesigneracorn.com%2Fwp-admin%2Fthemes.php) 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://designeracorn.com/wp-login.php?action=enter_recovery_mode&rm_token=uN9hsEeDFSlmB6lQo1M8lX&rm_key=UgLsF7MTx5ewq2R6vSRA9c

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.



Error Details
=============
An error of type E_ERROR was caused in line 180 of the file /var/www/wp-content/themes/thegem/inc/megamenu/megamenu.class.php. Error message: Uncaught ArgumentCountError: Too few arguments to function TheGem_Mega_Menu::replace_walker_class(), 1 passed in /var/www/wp-includes/class-wp-hook.php on line 286 and exactly 2 expected in /var/www/wp-content/themes/thegem/inc/megamenu/megamenu.class.php:180
Stack trace:
#0 /var/www/wp-includes/class-wp-hook.php(286): TheGem_Mega_Menu->replace_walker_class('Menu_Icons_OBFX...')
#1 /var/www/wp-includes/plugin.php(208): WP_Hook->apply_filters('Menu_Icons_OBFX...', Array)
#2 /var/www/wp-content/plugins/themeisle-companion/obfx_modules/menu-icons/init.php(239): apply_filters('wp_edit_nav_men...', '')
#3 /var/www/wp-includes/class-wp-hook.php(286): Menu_Icons_OBFX_Module->check_conflict('')
#4 /var/www/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array)
#5 /var/www/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#6 /var/www/wp-admin/admin.php(169): do_action('admin_init')
#7 /var/www/wp-admin/customize.php(13): require_once('/var/www/wp-adm...')
#8 {main}
 thrown 

I have lost my entire website, all of its content and images, please resolve ASAP.