Errors are improperly handled on repository creation

Sentry Issue: ARKINDEX-FRONTEND-FH

Error: Request failed with status code 400
  at createError (./node_modules/axios/lib/core/createError.js:16:15)
  at settle (./node_modules/axios/lib/core/settle.js:17:12)
  at apply (./node_modules/axios/lib/adapters/xhr.js:61:7)
  at r (./node_modules/@sentry/browser/esm/helpers.js:71:23)

Although errors are indeed displayed, they use useError and the error handling code in the store causes errors to not be truly caught; they still get sent to Sentry.