Hello,
Excuse me for my poor English ...

I will try to describe to you my problem that has appeared since yesterday.
I have version 3.40.1 of Calibre and I don't know what happened, but since yesterday, when I want to add an epub in my library, I have the following error message:
Traceback (most recent call last):
File "site-packages \ template \ gui2 \ add.py", line 413, in add_book
File "site-packages \ template \ db \ legacy.py", line 224, in create_book_entry
File "site-packages \ caliber \ db \ cache.py", line 63, in call_func_with_lock
File "site-packages \ template \ db \ cache.py", line 1557, in create_book_entry
File "site-packages \ template \ db \ backend.py", line 845, in execute
File "c: \ t \ t \ apsw-bdov6u \ apsw-3.23.1-r1 \ src \ cursor.c", line 236, in resetcursor
CantOpenError: CantOpenError: unable to open database
I uninstalled and reinstalled Calibre, but I still have the same problem ...
Could you help me solve this annoying problem
Thanks a lot and have a good day