"Your Action is required" in PR application status

[SumitM20161]

I got the MEP on 28 march when the status my application turned to "Updated"
But today morning, it changed to "Your action is required.
I see no message in my account. Can someone please help me to understand what exactly does this mean?

 

[skape7]

Considering you just cleared Medicals, you probably have received or are just about to receive a letter for Biometrics