I died, had an error and my stuff was gone

I died and I got an error occurred and all of my stuff despawned like my diamond gear (diamond chest plate with protection 3 and mending, diamond leggings with blast protection 4 mending thorns 2, diamond helmet with protection 4 unbreaking 3 mending auqua affinity, diamond boots with feather falling 4 protection 4 mending depth strider 3, a diamond sword with sharpness 3 looting 3 fire aspect 1 mending unbreaking 3, another diamond sword with smite 4 unbreaking 3, an elytra with mending, a nether star, a trident with impaling 4 and loyalty 3 and a bow with flame 1 infinity power 5 unbreaking 3 punch 2) I would like to have my stuff back.

 

From: Friso van Saase