DropBox Search not working in JavaScript API

Dropbox filesSearch from Javascript has again stopped working. Was working till 12 hours ago. Also please note the double quotes are to match the exact characters to the file as per your documentation. This has happened once before 2 years ago. It returns zero matches. Big problem please! Please see this code:

dbx.filesSearch({ path: '', query: '"0102526ADM00571"_' }).then(function (response) {

console.log('response', response);

}).catch(function(error) {

console.log('Error', error);

alert('Error! Please check log!');

});