Have you tried looking in Mod Manager? I think it's in Bin 64, but don't quote me on it.
It's in the BIN32 folder.
- Go to the BIN32 folder
- Click on the ModMgr.exe
- It opens the Mod Manager: This is the old school method to manage your content.
- Make sure your working dir is the \rfactor2 root folder (not rFactor2/Bin32)
- Make sure your packages dir is the \rfactor2\pacages folder (not \rfactor2\pacages\Bin32)
- Tick the Components to manage cars and tracks
- Tick Mods to manage all server mods: you'll find them under "serries" ingame: IMO: it's best to uninstall and delete them all.
- update packages, or mods that require a missing base mod will be highlighted in red.
You can uninstall, delete them, or install the missing component to fix it.
My guess is that the URD_T5_Aura v2.03 is an update package that is created for league purposes and it requires the base mod: URD_T5_Aura v2.00. That is the original paid component from URD.
PS: steam workshop content you uninstall and delete this way will be reinstalled until you unsubscribe from this item.