Error when deleting payment method

TypeError: IPS\File::get(): Argument #2 ($url) must be of type IPS\Http\Url|string, null given, called in /home/arkonent/public_html/applications/nexus/sources/Gateway/Gateway.php on line 441 (0)
#0 /home/arkonent/public_html/applications/nexus/sources/Gateway/Gateway.php(441): IPS\File::get('nexus_Gateways', NULL)
#1 /home/arkonent/public_html/system/Node/Controller.php(1389): IPS\nexus\Gateway->delete()
#2 /home/arkonent/public_html/applications/nexus/modules/admin/payments/gateways.php(211): IPS\Node\Controller->delete()
#3 /home/arkonent/public_html/system/Dispatcher/Controller.php(128): IPS\nexus\modules\admin\payments\gateways->delete()
#4 /home/arkonent/public_html/system/Node/Controller.php(117): IPS\Dispatcher\Controller->execute()
#5 /home/arkonent/public_html/applications/nexus/modules/admin/payments/gateways.php(61): IPS\Node\Controller->execute()
#6 /home/arkonent/public_html/applications/nexus/modules/admin/payments/paymentsettings.php(86): IPS\nexus\modules\admin\payments\gateways->execute()
#7 /home/arkonent/public_html/system/Dispatcher/Controller.php(128): IPS\nexus\modules\admin\payments\paymentsettings->__call('delete', Array)
#8 /home/arkonent/public_html/system/Dispatcher/Dispatcher.php(169): IPS\Dispatcher\Controller->execute()
#9 /home/arkonent/public_html/admin/index.php(15): IPS\Dispatcher->run()
#10 {main}

I'm currently on Beta 6 - this error appears when I try to delete any form of payment method