Backdoor link fails if isTicketRequiredToMutate == true

[sentry]

If the event has the value isTicketRequiredToMutate == true when someone without a ticket attempts to add a session, they will be denied with insufficient permissions error.

In addition this error didn't make it back to the user, so they don't know why the session didn't submit. The page simply flashed and nothing.

Sentry Issue: THATUS-2KX

Error: Non-Error exception captured with keys: extensions, message, path
  at te (/_app/chunks/index-c4d62efb.js:34:910)
  at None (../../../../../src/_dataSources/api.that.tech/utilities/error.js:14:4)
  at e.withScope (/_app/chunks/index-c4d62efb.js:23:15206)
  at g (/_app/chunks/index-c4d62efb.js:34:777)
  at oe (/_app/chunks/index-c4d62efb.js:34:1392)
...
(5 additional frame(s) were not displayed)