Our team is happy to support you if:

• You are using the latest version of TM:PE v11 STABLE or TM:PE v11 LABS
  
• You are using a properly purchased and latest version of Cities: Skylines
  
• You provide useful information when reporting a bug

We will not provide support if:

• You are using a pirated or old version of Cities: Skylines
  
• You are using an older version of the mod

TM:PE is only tested on and updated for the latest version of Cities: Skylines.

Hello, each time I activate this mod the game displays 2 error messages then black screen.

I need logs. You didn't said what errors. I'm not a clairvoyant, sorry.

Oh yes sorry

A Mod caused an error [System.Exception]

Details:
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.IO.IOException: Sharing violation on path /Volumes/SSD LA T5/Steam 2/steamapps/common/Cities_Skylines/Cities.app/Contents/TMPE.log
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.StreamWriter..ctor (System.String path, Boolean append, System.Text.Encoding encoding, Int32 bufferSize) [0x00000] in <filename unknown>:0
at System.IO.StreamWriter..ctor (System.String path, Boolean append) [0x00000] in <filename unknown>:0
at (wrapper remoting-invoke-with-check) System.IO.StreamWriter:.ctor (string,♥♥♥♥)
at System.IO.File.AppendText (System.String path) [0x00000] in <filename unknown>:0
at CSUtil.Commons.Log.LogToFile (System.String log, LogLevel level) [0x00000] in <filename unknown>:0
at CSUtil.Commons.Log.InfoFormat (System.String format, System.Object[] args) [0x00000] in <filename unknown>:0
at TrafficManager.TrafficManagerMod.OnEnabled () [0x00000] in <filename unknown>:0
at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (object,object[],System.Exception

?!

Did you move the game do the other directory manually recently?

yes

OK, so here[github.com] you can find possible solutions.