Load a database from the server Failed Error: file is encrypted or is not a database

Load a database from the server Failed Error: file is encrypted or is not a database
Here are my codes. test.db is in the root directory of my website
var xhr = new XMLHttpRequest();
xhr.open('GET', 'test.db', true);
xhr.responseType = 'arraybuffer';

xhr.onload = function(e) {
var uInt8Array = new Uint8Array(this.response);
var db = new SQL.Database(uInt8Array);
var contents = db.exec("SELECT * FROM testtable");
};
xhr.send();

Start with the XMLHttpRequest and SQL.Database construction shown in the issue, and reproduce the failure while inspecting the downloaded test.db response. Check the project’s browser-loading entry points and existing database-loading tests, if available. Done means identifying the cause of the reported error and defining a verified loading path or a documented limitation.