I am receiving DLC via Trainz plus gold membership that has both errors and faulty dependencies, WHY???? I thought content is vigorously checked to avoid these.
That is actually Trainz Plus (Windows), not TRS22 even though it shows as 2022 on the Windows menu bar. It is not the latest version of Trainz Plus (build 132284) but is a better (but more complex) version than TRS22.
I just installed the Pro Trains: Altoona Works and also got the following during the install.
Loading the route into Content Manager revealed that there are no errors or missing assets.
I have reported the message to N3V QA as a possible bug.
You can click on Cancel to remove that error and most of the time the error is gone. It's been reported multiple times to N3V but the Content Store is low priority when it comes to fixes and updates.