SQLITE3 tenta escrever um banco de dados readonly
//do the follow
chown www-data /myproject
chown www-data /myproject/db.sqlite3
chmod 777 /myproject/db.sqlite3
GutoTrosla
//do the follow
chown www-data /myproject
chown www-data /myproject/db.sqlite3
chmod 777 /myproject/db.sqlite3