Armour problems

I am having problems with implementing armour into my mod. I am not sure if i have made any mistakes in the process, since I am using the MCreator itself, and avoiding touching the code in any way. The problem is that whenevr I am trying to make armour, the item texture does not show up (load). Unnamed, a black and purple texture, yet as a model on the player it looks fine. I have tried watching different videos and read amny topics about it, but nothing seems to help. If anyone had the same or a similar problem and succeded on fixing it, please help me. Thanks to everyone in advance.