[Yecats]

Hi,
I have been using calibre for a little while, still pretty new. I havnt had any issues so far, until now.
My books are mobi/kindle format. All of them are the same format. Some of the books I have saved on my computer are uploaded to calibre already with no problems, and others that are the same format are all of a sudden not working. I tried another one that I already uploaded to calibre that worked and now its not working.
I use windows. I read on a few old forum post that it was a zip problem, but they were all mac users with advice for ibooks and mac. Any insight would be greatly appreciated :-)

This is the error message

calibre, version 6.8.0
WARNING: Errors while adding: There were problems adding some files, click "Show details" for more information


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Failed to add the file C:/Users/stace/OneDrive/Kindle/Harry Potter/Harry Potter and the Philosophers Stone.mobi to the book: Harry Potter and the Philosophers Stone
With error:
Traceback (most recent call last):
File "calibre\gui2\add.py", line 487, in add_formats
File "calibre\db\cache.py", line 1814, in add_format
File "calibre\db\cache.py", line 1771, in _do_add_format
File "calibre\db\backend.py", line 1722, in add_format
File "shutil.py", line 195, in copyfileobj
OSError: [Errno 22] Invalid argument