Hi there @akshaykoshti401,

What are the permissions of your SQLite file? To check that run ls -lah inside the directory where you store your database file.

You need to make sure that the file is owned by the apache user so that it could write to it. To adjust that run:

sudo chown www-data: /path/to/your/sqlite/file

Change the /path/to/your/sqlite/file part with the actual path to yuor SQLite file.

Hope that this helps.
Regards,
Bobby