Fatal error: Uncaught TypeError: Return value of NF_Admin_Metaboxes_Calculations::registerReactMetabox() must be an instance of void, none returned in /home/clients/51292418d36cb06b90a8e18a2ecf5052/web/vizar/wp-content/plugins/ninja-forms/includes/Admin/Metaboxes/Calculations.php:37
Stack trace:
#0 /home/clients/51292418d36cb06b90a8e18a2ecf5052/web/vizar/wp-content/plugins/ninja-forms/includes/Admin/Metaboxes/Calculations.php(7): NF_Admin_Metaboxes_Calculations->registerReactMetabox()
#1 /home/clients/51292418d36cb06b90a8e18a2ecf5052/web/vizar/wp-content/plugins/ninja-forms/ninja-forms.php(370): NF_Admin_Metaboxes_Calculations->__construct()
#2 /home/clients/51292418d36cb06b90a8e18a2ecf5052/web/vizar/wp-content/plugins/ninja-forms/ninja-forms.php(1223): Ninja_Forms::instance()
#3 /home/clients/51292418d36cb06b90a8e18a2ecf5052/web/vizar/wp-content/plugins/ninja-forms/ninja-forms.php(1226): Ninja_Forms()
#4 /home/clients/51292418d36cb06b90a8e18a2ecf5052/web/vizar/wp-settings.php(409): include_once('/home/clients/5...')
#5 / in /home/clients/51292418d36cb06b90a8e18a2ecf5052/web/vizar/wp-content/plugins/ninja-forms/includes/Admin/Metaboxes/Calculations.php on line 37
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