I traced this back to commit 6a953fa6b47bf0c0fa4c362ebdcbc98fdcb19cef by @clemenskreutz. The log file is looking like this:
04-Aug-2020 18:33:22 working
07-Aug-2020 16:15:16 errors in ResponseCurve
07-Aug-2020 22:10:14 errors in TurboSplines ResponseCurve
07-Aug-2020 23:35:22 errors in TurboSplines
I traced this back to commit 6a953fa6b47bf0c0fa4c362ebdcbc98fdcb19cef by @clemenskreutz. The log file is looking like this: