Request for Initial Evidence Was Sent

1

I got Request for Initial Evidence Was Sent for my H1B I-129 petition?
What does it mean? is my employer missed to send some mandatory proofs/documents?
Also what things can trigger this kind of RFE?,
I hope this is an easy RFE to answer and get pass by.

2

Request for initial evidence meaning your lawyer may have missed to attach one or more documents in the initial list of documents to be provided with your H1B petition.