[ENG-10738] Registration creation failed due to missing null check during throttle check#11676

cslzchen merged 2 commits intoCenterForOpenScience:hotfix/26.6.3CenterForOpenScience/osf.io:hotfix/26.6.3from

Ostap-Zherebetskyi:hotfix/email_throttleOstap-Zherebetskyi/osf.io:hotfix/email_throttleCopy head branch name to clipboard