non-existent submissions and canceled submit50

[joaosingado12]

I'm not able to send my tasks to send50, in "Problem Set 0" it asks me to enter my account and click on "authorize 50", but when I click on the link a screen appears saying "No submissions". And when I'm in cs50 IDE, in the shell I enter "submit50" and it instantly shows "submission cancelled" or "submit50: error: the following arguments are required: slug", when i use "submit50 slug" show "invalid slug" and "submission cancelled.