How to remove Author and Category from a single portfolio page?

I have a little issue with removing the Category and Author from my single portfolio pages. I tried different suggestions from other posts here and nothing worked, I also tried to modify the code myself and am hitting a wall again. Apparently it seems the right code to be added is strictly individual depending on the page and I was hoping someone can give me a little nudge. I’am using the Edge theme and there’s the link to one of the pages that I’m trying to work on:

https://etc-fos4panel-prd.azurewebsites.net/?portfolio-item=wireless-control

Thank you all in advance!