Your library is in your Documents folder (C:\Users\chara\Documents\Calibre new') which by default is a Windows Controlled folder, that's been known to create access problems.
Try turning Controlled Folder Access off, it's in Windows Security->Ransomware Protection.
If that's the problem, move your library out of Documents, which you can do that via the Library Switch/Create tool… I suggest somewhere like
Code:
C:\Users\chara\Calibre\Calibre new
Then turn Controlled folder access back on.
BR