System Error 0.

Hi, I have a local database for a Fivem server with the QBCORE framework. Everything was normal until suddenly I noticed that my database isn't loading in the server console. I had the database open in HEIDISQL, I closed the application, and when I reopened HeidiSQL, I noticed that the launcher was stuck and giving me this error: 'Connection Failed: Lost connection to server at 'handshake: reading initial communication packet. System Error 0'. And it happened suddenly because minutes before the database was working perfectly. I'm using XAMPP as usual and have the Apache and MySql checkboxes active as always. What could it be?"