[v1.8.9] error - C:\Python34\lib\site-packages\xlrd\book.py:1446

OpenNumismat: 1.8.9
OS: Windows 10 (10.0.19041)
Python: 3.4.4 (32bit)
Qt: 5.5.1
Locale: it

Traceback (most recent call last):
File "OpenNumismat\MainWindow.py", line 661, in importExcel
File "OpenNumismat\Collection\Import\__init__.py", line 127, in importData
File "OpenNumismat\Collection\Import\Excel.py", line 128, in _connect
File "C:\Python34\lib\site-packages\xlrd\__init__.py", line 162, in open_workbook
File "C:\Python34\lib\site-packages\xlrd\book.py", line 116, in open_workbook_xls
File "C:\Python34\lib\site-packages\xlrd\book.py", line 1199, in parse_globals
File "C:\Python34\lib\site-packages\xlrd\book.py", line 1170, in handle_sst
File "C:\Python34\lib\site-packages\xlrd\book.py", line 1446, in unpack_SST_table
struct.error: unpack requires a bytes object of length 4