Page to Edit solution will not load

I can read my solution just fine, but am having trouble editing it to add a code review's improvement. After clicking on "Edit", I wait a while (3 minutes) and still only see the spinner, nothing happens. Maybe it's a temporary issue?

Link to solution (works fine):

https://py.checkio.org/mission/min-max/publications/heitor/python-3/use-sort/share/51d009956b290f6915bb65e4f7fdfdc0/

Link to edit the solution:

https://py.checkio.org/mission/min-max/publications/heitor/python-3/use-sort/share/51d009956b290f6915bb65e4f7fdfdc0/edit/