An exception occurred: [ErrorException] [E_WARNING] Attempt to read property "user_id" on null in src/addons/DC/SiropuReferral/Siropu/ReferralSystem/Repository/Referrer.php on line 95

  1. XF::handlePhpError() in src/addons/DC/SiropuReferral/Siropu/ReferralSystem/Repository/Referrer.php at line 95
  2. DC\SiropuReferral\Siropu\ReferralSystem\Repository\Referrer->getEntityUserId() in src/addons/DC/SiropuReferral/Siropu/ReferralSystem/Repository/Referrer.php at line 37
  3. DC\SiropuReferral\Siropu\ReferralSystem\Repository\Referrer->getValidReferrer() in src/addons/Siropu/ReferralSystem/Listener.php at line 16
  4. Siropu\ReferralSystem\Listener::appPubComplete() in src/XF/Extension.php at line 69
  5. XF\Extension->fire() in src/XF/App.php at line 2990
  6. XF\App->fire() in src/XF/Pub/App.php at line 478
  7. XF\Pub\App->complete() in src/XF/App.php at line 2486
  8. XF\App->run() in src/XF.php at line 524
  9. XF::runApp() in index.php at line 20