Whoops\Exception\ErrorException thrown with message "Undefined array key "icons_homescreen_maskable""

Stacktrace:
#6 Whoops\Exception\ErrorException in /var/www/html/ips/applications/core/modules/admin/customization/icons.php:218
#5 Whoops\Run:handleError in /var/www/html/ips/applications/core/modules/admin/customization/icons.php:218
#4 IPS\core\modules\admin\customization\_icons:processApplicationIcon in /var/www/html/ips/applications/core/modules/admin/overview/onboard.php:183
#3 IPS\core\modules\admin\overview\_onboard:manage in /var/www/html/ips/system/Dispatcher/Controller.php:118
#2 IPS\Dispatcher\_Controller:execute in /var/www/html/ips/applications/core/modules/admin/overview/onboard.php:40
#1 IPS\core\modules\admin\overview\_onboard:execute in /var/www/html/ips/system/Dispatcher/Dispatcher.php:153
#0 IPS\_Dispatcher:run in /var/www/html/ips/admin/index.php:13

URL: /admin/?app=core&module=overview&controller=onboard&initial=1 (on submitting the onboarding wizard)

The only action I took during the wizard was to change the site URL (no uploads). I'm IN_DEV.

Thanks, I have fixed this for an upcoming release.