Error while index creation during first time server start-up

I found the following error while running my server python file:

```python
sqlite3.OperationalError: no such module: fts4
```
As a result of the error, the searching doesn't work anymore, as mentioned in your README note.  
I also found that `sqlite3`, in the recent versions, ships with `fts5`, and requires recompiling and other complex stuff for `fts4` support.