but I have not changed anything, this happened last night and I have not made any changes: / and not only to me has happened to me, if not to other faucets
You can read on possible causes of this error here:
http://dev.mysql.com/doc/refman/5.7/en/gone-away.html . Almost all point to hosting problems, which is also confirmed by the fact that you didn't change anything. Either your traffic increased a lot and your hosting plan can't handle that or the hosting company changed something.