Pressing cancel when editing comment on journal post generates whale shark error

Platform (Android, iOS, Website): Website

Browser, if a website issue (Firefox, Chrome, etc) : Opera

  1. Post comment on project journal post
  2. Click ‘edit’ for comment.
  3. Either make some changes, or make none (error occurs regardless)
  4. Click cancel
  5. Whale shark error appears

Just tested and the error also occurs on my phone (Chrome app, iOS)

Made a github issue: