Why am I getting an asset error TileLines[1].jpg?

That error seems to have happened from one version to another in C4D with content browser changes.

Here is the fix:

In the "Preferences" menu click the "Files" column.

In that window, in the first available slot, copy and paste the line below:

preset://gsg_city_kit.lib4d/tex/

Here is an example.

 That should do it!