Hello Adriano,
I get this error...
REPLACE INTO `invite_groups` ( `is_id`, `is_canvite`, `is_unlimited` ) VALUES ( 2, NULL, NULL )
IPS\Db\Exception: Column 'is_canvite' cannot be null (1048)
#0 /home1/tab32716/public_html/system/Db/Db.php(967): IPS\_Db->preparedQuery('/*tab32716_foru...', Array)
#1 /home1/tab32716/public_html/applications/invite/sources/Member/Group.php(34): IPS\_Db->replace('invite_groups', Array)
#2 /home1/tab32716/public_html/applications/invite/extensions/core/GroupForm/Invite.php(60): IPS\invite\Member\_Group::setGroupData(2, NULL, NULL)
#3 /home1/tab32716/public_html/applications/core/modules/admin/members/groups.php(224): IPS\invite\extensions\core\GroupForm\_Invite->save(Array, Object(IPS\Member\Group))
#4 /home1/tab32716/public_html/system/Dispatcher/Controller.php(90): IPS\core\modules\admin\members\_groups->form()
#5 /home1/tab32716/public_html/applications/core/modules/admin/members/groups.php(39): IPS\Dispatcher\_Controller->execute()
#6 /home1/tab32716/public_html/system/Dispatcher/Dispatcher.php(153): IPS\core\modules\admin\members\_groups->execute()
#7 /home1/tab32716/public_html/admin/index.php(13): IPS\_Dispatcher->run()
#8 {main}