[v1.8.4] TypeError - C:\Python34\lib\site-packages\dateutil\parser.py:61

Is there something I can do to fix this error?

I just had the following error while trying to import my excel list of coins. Can you help me fix this issue by providing suggestions to what I need to do? Thanks so much.

[v1.8.4] TypeError - C:\Python34\lib\site-packages\dateutil\parser.py:61

OpenNumismat: 1.8.4
OS: Windows 10 (10.0.18362)
Python: 3.4.4 (32bit)
Qt: 5.5.1
Locale: en

Traceback (most recent call last):
File "d:\OpenNumismat\open-numismat\OpenNumismat\MainWindow.py", line 653, in importExcel
File "d:\OpenNumismat\open-numismat\OpenNumismat\Collection\Import\__init__.py", line 149, in importData
File "d:\OpenNumismat\open-numismat\OpenNumismat\Collection\Import\Excel.py", line 202, in _setRecord
File "C:\Python34\lib\site-packages\dateutil\parser.py", line 1182, in parse
File "C:\Python34\lib\site-packages\dateutil\parser.py", line 556, in parse
File "C:\Python34\lib\site-packages\dateutil\parser.py", line 675, in _parse
File "C:\Python34\lib\site-packages\dateutil\parser.py", line 192, in split
File "C:\Python34\lib\site-packages\dateutil\parser.py", line 61, in __init__
TypeError: Parser must be a string or character stream, not float