Receipts list and product receipt grayed out

Hello Experts,

I need some help here please... so it wa brought ot my attension that oth the Receipts list and product receipt are grayed out. The user said he has done everything right but doest not seem to understand why they are crayed out i have research the issue but could not resolve it.

I wouls apprecate f someone could help expain the process to have these buttons active to further process PO/invoices

* am very new to AX

thanks a mil.