Funwithfruit - sorry on my delayed response, haven't played/modded for this game in over a year or two. What this error probably means is that a prop I included in this asset wasn't included in the asset's file set when I uploaded to steam and I probably didn't link the pile of crates you see in the images to the workshop properly. The asset will still work, it just won't have those 3 stacked green army crates in the asset itself. I believe I made those crates separately, so with all the features and new prop mods available, you should have no problems adding those yourself. Thanks for the comment.

AmmoCrate_Wood_1_2.0_Stack-Prop.AmmoCrate_Wood_1_2.0_Stack-Prop_Data
Required in: 454274150.Military_Helipad_Empty_1.1_2x4_Data
Workshop asset requires private content, seems like asset bug