Error tracking page seems broken

Summary

After setting up sentry error tracking from the sidemenu on gitlab.com, I see only a blank page with a loading indicator. No error message, or status message is displayed.

Steps to reproduce

1. Create a project on https://sentry.io
2. Enable error tracking from the side menu on a gitlab.com repository
3. Attempt to view sentry's errors in gitlab, by going to the error tracking page

Example Project

I created an example project here: https://gitlab.com/daraul/sentry-test/error_tracking

What is the current bug behavior?

When I open the error tracking page, under the operations header, I see only a loading indicator.

What is the expected correct behavior?

I'm not sure. A list of my current errors in sentry, or "No errors!" if there aren't any open ones.

Relevant logs and/or screenshots

A screenshot of the page itself:

Output of checks

This bug happens on GitLab.com

Results of GitLab environment info

Expand for output related to GitLab environment info

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:env:info)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production)

Results of GitLab application Check

Expand for output related to the GitLab application check

(For installations with omnibus-gitlab package run and paste the output of:
sudo gitlab-rake gitlab:check SANITIZE=true)
(For installations from source run and paste the output of:
sudo -u git -H bundle exec rake gitlab:check RAILS_ENV=production SANITIZE=true)
(we will only investigate if the tests are passing)

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)