Bug/Issue Crash to desktop when saving/sleeping

SMAPI log: https://log.smapi.io/dDbUT6yZ

What it says on the tin--game crashes to desktop when saving or sleeping. SaveAnywhere mod sometimes saves, sometimes crashes. Sleeping always crashes. No errors showing in SMAPI log, but my Terminal window displays this after crash:
"
Stacktrace:



Native stacktrace:



Debug info from gdb:


xcode-select: note: no developer tools were found at '/Applications/Xcode.app', requesting install. Choose an option in the dialog to download the command line developer tools.


=================================================================

Got a SIGSEGV while executing native code. This usually indicates

a fatal error in the mono runtime or one of the native libraries

used by your application.

=================================================================


Abort trap: 6

logout
"

and a window appears to open/download xcode while asking if I want to report/ignore SV shutdown: windown says "The lldb command requires the command line developer tools. Would you like to install the tools now?" What is going on?