Qatar Airways Privilege Club - QR569 on July 3rd what happened??

Hey. I was just checking QR flights as usual and have noticed that QR569 from Tunis to Doha on july 3rd was cancelled although the flight arrived from Doha without any problem i think. Can anyone one know what happened? was it a technical thing? its an A332 so was really wondering what went wrong.

Thanks in advance:)