I created a HUSTLE action but when I save it it is not saved

I tried to add a new HUSTLE ACTIVE OPT-INS, it was for MailChimp and I added the Enter your API key and I made all the steps,
NAME & EMAIL SERVICE then CONTENT & DESIGN then DISPLAY SETTINGS,
and at the last step I click on next, but it just send me back to the first main HUSTLE with no ACTIVE OPT-INS created.?