Hi Benjamin, I just had a look at your "Bigg City Yard" - good job! However I did see an asset with missing dependencies. It was "PPR Signal Cabin" <Kuid:106916:10289> - Easy enough to just delete that item and replace it with something else.
Cheers,
Roy3b3
Nothing missing for me. Maybe it's a CM problem. The only dependency I show for the signal cabin is angelc's Interlocking levers (<kuid:324760:28036>) and it's on the DLS. You might try downloading it manually.