Invalid JSON String - Load Data

I had some problems loading templates. It did not work both the storage in a .json file and the processing in a mysql database. my loading.php is very simple for testing: <?php $ str = filegetcontents ('database.json'); echo $ str; ?> The string was split into individual characters and packaged in an array. After adjusting the following line everything worked well: grapes.js - line 42667 return this.onResponse (text, clb); to return this.onResponse (JSON.parse (text), clb); I also have the same problem when uploading assets ... here, however, I have not come up with the solution yet.