Too many redirects on import
When importing a larger repo, We get redirected through the project page, then the import page, and then back to the project page. Etc.
Basically while on the import page, at some point the repo now exists but the import is not finished, the require_no_repo function redirects you to the project page, which sees that an import is in process and redirects to back to import. And this continues until the browser stops it.
Reloading the page after the import is finished works fine.