[10:02:37 WARN  Save Backup] Couldn't back up save files (see log file for details).
[10:02:37 TRACE Save Backup] System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.TypeLoadException: Could not load type 'System.Buffers.ArrayPool`1' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
  at System.IO.Compression.ZipFile.CreateFromDirectory (System.String sourceDirectoryName, System.String destinationArchiveFileName, CompressionLevel compressionLevel, Boolean includeBaseDirectory) <0x41080bc0 + 0x00053> in <filename unknown>:0 
  at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) <0x40d0e0f0 + 0x000a3> in <filename unknown>:0 
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) <0x40d0e0f0 + 0x000fb> in <filename unknown>:0 
  at System.Reflection.MethodBase.Invoke (System.Object obj, System.Object[] parameters) <0x40ed9600 + 0x0002a> in <filename unknown>:0 
  at StardewModdingAPI.Mods.SaveBackup.ModEntry.CreateBackup (System.IO.DirectoryInfo backupFolder) <0x41080240 + 0x0046f> in <filename unknown>:0