Hello,
I test AFT04 mission on DCS V 2.5.5.41371, and I issued the same bug.
I bought AFT campaign on may, 24th, 2020.
Everything runs well unitil WP 8. The last communication with me FE is "Land and shutdown, then I'll give you your rating".
I land, I park on several aprons, but nothing happens, the FE doesn't give me my rating so I can't pass the PO and proceed to the next mission.
I remember that the FE didn't give me my rating on practise mission too. :(