boostback button does nothing with KSP 1.12.2.3167 when logging switched on

[oyster-catcher]

From KSP.log

FAR is not present

[ERR 19:27:59.786] ADDON BINDER: Cannot resolve assembly: FerramAerospaceResearch, Culture=neutral, PublicKeyToken=null

[ERR 19:27:59.786] ADDON BINDER: Cannot resolve assembly: FerramAerospaceResearch, Culture=neutral, PublicKeyToken=null

[LOG 19:27:59.789] [BoosterGuidance] Checking for FAR - failed(System.IO.FileNotFoundException: Could not load file or assembly 'FerramAerospaceResearch, Version=0.15.11.3, Culture=neutral, PublicKeyToken=null' or one of its dependencies.
File name: 'FerramAerospaceResearch, Version=0.15.11.3, Culture=neutral, PublicKeyToken=null'
at Trajectories.AerodynamicModelFactory.HasFAR () [0x00000] in <2951893159c74fa99fc18aa1888e6ce5>:0 )
[LOG 19:27:59.789] [BoosterGuidance] Start hasFAR=False

[LOG 19:38:03.559] [BoosterGuidance] Enabled Guidance for vessel HECS2.ProbeCore
[EXC 19:38:03.567] IOException: Sharing violation on path /Users/adrian/Library/Application Support/Steam/steamapps/common/Kerbal Space Program/HECS2.ProbeCore.Actual.dat
System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) (at <9577ac7a62ef43179789031239ba8798>:0)^M
System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.IO.FileOptions options, System.String msgPath, System.Boolean bFromProxy, System.Boolean useLongPath, System.Boolean checkHost) (at <9577ac7a62ef43179789031239ba8798>:0)^M
(wrapper remoting-invoke-with-check) System.IO.FileStream..ctor(string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare,int,System.IO.FileOptions,string,bool,bool,bool)^M
System.IO.StreamWriter.CreateFile (System.String path, System.Boolean append, System.Boolean checkHost) (at <9577ac7a62ef43179789031239ba8798>:0)^M
System.IO.StreamWriter..ctor (System.String path, System.Boolean append, System.Text.Encoding encoding, System.Int32 bufferSize, System.Boolean checkHost) (at <9577ac7a62ef43179789031239ba8798>:0)^M
System.IO.StreamWriter..ctor (System.String path, System.Boolean append, System.Text.Encoding encoding, System.Int32 bufferSize) (at <9577ac7a62ef43179789031239ba8798>:0)^M
System.IO.StreamWriter..ctor (System.String path) (at <9577ac7a62ef43179789031239ba8798>:0)^M
(wrapper remoting-invoke-with-check) System.IO.StreamWriter..ctor(string)^M
BoosterGuidance.BLController.StartLogging (System.String filename) (at <2951893159c74fa99fc18aa1888e6ce5>:0)^M
BoosterGuidance.BoosterGuidanceCore.StartLogging () (at <2951893159c74fa99fc18aa1888e6ce5>:0)^M
BoosterGuidance.BoosterGuidanceCore.EnableGuidance (KSPActionParam param) (at <2951893159c74fa99fc18aa1888e6ce5>:0)^M
BoosterGuidance.MainWindow.EnableGuidance (BoosterGuidance.BLControllerPhase phase) (at <2951893159c74fa99fc18aa1888e6ce5>:0)^M
BoosterGuidance.MainWindow.MainTab (System.Int32 windowID) (at <2951893159c74fa99fc18aa1888e6ce5>:0)^M
BoosterGuidance.MainWindow.WindowFunction (System.Int32 windowID) (at <2951893159c74fa99fc18aa1888e6ce5>:0)^M
UnityEngine.GUI.CallWindowDelegate (UnityEngine.GUI+WindowFunction func, System.Int32 id, System.Int32 instanceID, UnityEngine.GUISkin _skin, System.Int32 forceRect, System.Single width, System.Single height, UnityEngine.GUIStyle style) (at :0)^M
UnityEngine.DebugLogHandler:LogException(Exception, Object)^M
ModuleManager.UnityLogHandle.InterceptLogHandler:LogException(Exception, Object)^M
UnityEngine.Debug:CallOverridenDebugHandler(Exception, Object)
[LOG 19:38:04.184] [BoosterGuidance] Vessel=HECS2.ProbeCore useFAR=False