SqliteException: SQLite error no such table

I’ve been looking for solutions since yesterday and I can’t seem to find any. It always says there’s no such table when I try to insert a record on my database.

Error Details:
Mono.Data.Sqlite.SQLite3.Prepare (Mono.Data.Sqlite.SqliteConnection cnn, System.String strSql, Mono.Data.Sqlite.SqliteStatement previous, UInt32 timeoutMS, System.String& strRemain)
Mono.Data.Sqlite.SqliteCommand.BuildNextCommand ()
UnityEngine.EventSystems.EventSystem:Update()

This is my code:

connectionString = “URI=file:” + Application.persistentDataPath + “/ReportCards.sqlite”;

string filepath = Application.persistentDataPath + “/” + “ReportCards.sqlite”;

			if (!File.Exists (filepath)) 
			{
                         WWW loadDB = new WWW ("jar:file://" + Application.dataPath + "!/assets/" + "ReportCards.sqlite");
					while (!loadDB.isDone) {}
					File.WriteAllBytes (filepath, loadDB.bytes);

			}

			connectionString = "URI=file:" + filepath;

			dbcon = new SqliteConnection (connectionString);
			dbcon.Open ();

private void InsertScore(string name ,int score, int time, string remarks)
{

			if (playerScore >= 5 && playerScore<= 26) 
			{
					remarks = "EXCELLENT";
			} 
			else if (playerScore == 4) 
			{
					remarks = "OUTSTANDING";
			} 
			else if (playerScore == 3) 
			{
					remarks = "VERY GOOD";
			}
			else if (playerScore == 2) 
			{
					remarks = "GOOD";
			}
			else if (playerScore == 1) 
			{
					remarks = "FAIR";
			}
			else if (playerScore == 0) 
			{
					remarks = "NEEDS IMPROVEMENT";
			}

			using (IDbConnection dbConnection = new SqliteConnection (connectionString)) 
			{
					dbConnection.Open ();

					using (IDbCommand dbCmd = dbConnection.CreateCommand ()) 
					{
							string sqlQuery = String.Format ("INSERT INTO LetterRecognition(Name,Score,TimeConsumed_Seconds,Remarks)VALUES(\"{0}\",\"{1}\",\"{2}\",\"{3}\")" ,name,score,time,remarks);

							dbCmd.CommandText = sqlQuery;
							dbCmd.ExecuteScalar ();
							dbConnection.Close ();

					}
			}
	}