I tried to do what you say and it does not work in my chrome or firefox browsers. I've tried, from another laptop and it does not work either. I do not understand how it is possible that you were allowed to erase that course and not us. Any suggestions?
Anyway, and for not extending in this matter you could erase, since it works for you, all the requirements of the course
I'm going to send a premium ticket with this situation and I send back the admin keys because we have changed them. Greetings and thanks for attention