Same issue, I think. Just got the north amerian texture pack and this happened. Did not happen two days ago with vanilla pack.

The Mod D:\SteamLibrary\steamapps\workshop\content\255710\633547552 [RoadsUnited_Core.dll] has caused an error [ModException]

Details:
System.IO.FileNotFoundException: Could not find file "D:\SteamLibrary\steamapps\workshop\content\255710\680748394\BaseTextures\RoadLargeSegment-default-apr.dds".
File name: 'D:\SteamLibrary\steamapps\workshop\content\255710\680748394\BaseTextures\RoadLargeSegment-default-apr.dds'
at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x00000] in <filename unknown>:0
at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share) [0x00000] in <filename unknown>:0
at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare)
at System.IO.File.OpenRead (System.String path) [0x00000] in <filename unknown>:0
at System.IO.File.ReadAllBytes (System.String path) [0x00000] in <filename unknown>:0
at RoadsUnited_Core.RoadsUnited_Core.LoadTextureDDS (System.String fullPath) [0x00000] in <filename unknown>:0
at RoadsUnited_Core.RoadsUnited_Core.ReplaceNetTextures () [0x00000] in <filename unknown>:0
at RoadsUnited_Core.ModLoader.OnLevelLoaded (LoadMode mode) [0x00000] in <filename unknown>:0
at LoadingWrapper.OnLevelLoaded (UpdateMode mode) [0x00000] in <filename unknown>:0

yesp, its somehow connected to American Roads. I'v deleted RoadLargeSegment-default-apr.dds. Seems like a temporary fix, but not all orads are moded ... :(

Was going to post exactly the same issue. Good to know that is already posted. =)

I'm sorry, I changed some lines a while ago, haven't noticed this yet. Fixed it. Really sorry for the long delay.

no problem :)

No need to apologize.

Thanks for the patch. =)