Errors whilst listing item to sell

[unsteadyrex]

Hey, I'm trying to sell an item & although all the fields are filled in, when I hit 'List this item' it bounces back and tells me I've forgotten something... It doesn't tell me what I've forgotten or give any indication at all on what I need to do to list the item successfully. I have tried on both my laptop and mobile and it keeps doing the same thing.  I have also had someone else check the listing and they can not see where I might be going wrong either.. PLEASE HELP 😞

[*tippy*toes*]

What are you trying to list? Have a look in the item specifics after you get the error and see if there are any asterixes next to any of the boxes. If there is, you need to put something in those boxes. Have you put in your PayPal and postage options? Are you photos more than the minimum required size?