wb.save() on macOS causes confirmation prompt

[fzumstein]

OS (e.g. Windows 10 or macOS Sierra)

macOS Sierra

Versions of xlwings, Excel and Python (e.g. 0.11.8, Office 365, Python 3.7)

0.12.1, Office 16.19, Python 3.7

Describe your issue (incl. Traceback!)

wb.save() on macOS causes confirmation prompt

Include a minimal code sample to reproduce the issue (and attach a sample workbook if required!)

Run the followin 2x on from within a new Excel instance.

import xlwings as xw
wb = xw.Book()
wb.save()

[jeckun]

I have the same problem.
The code and error hints are as follows

import xlwings as xw
app = xw.App(visible=True, add_book=False)
wb = app.books.add()
wb.save()
wb.close() 

Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/aeosa/appscript/reference.py", line 482, in call
return self.AS_appdata.target().event(self._code, params, atts, codecs=self.AS_appdata).send(timeout, sendflags)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/aeosa/aem/aemsend.py", line 92, in send
raise EventError(errornum, errormsg, eventresult)
aem.aemsend.EventError: Command failed: The object you are trying to access does not exist (-1728)

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "", line 1, in
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/xlwings/main.py", line 682, in close
self.impl.close()
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/xlwings/_xlmac.py", line 224, in close
self.xl.close(saving=kw.no)
File "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/aeosa/appscript/reference.py", line 518, in call
raise CommandError(self, (args, kargs), e, self.AS_appdata) from e
appscript.reference.CommandError: Command failed:
OSERROR: -1728
MESSAGE: The object you are trying to access does not exist
COMMAND: app('/Applications/Microsoft Excel.app', newinstance=(0, 5907874)).workbooks['工作簿1'].close(saving=k.no)

[michaelobr]

I am having the same issue as @jeckun , was anybody able to resolve this?