Are you trying to copy link from a new item form? Copy link is supposed to give you a link to an existing item. When you are trying to click this button from the context of the New form - the item does not exist yet. Hence - it is impossible to construct the link:
Let me know if this helps.
Please click Accept as solution & :thumbs_up: if my answer helped you to solve your issue. This will help others to find the correct solution easily. If the answer was useful in other ways, please consider giving it :thumbs_up:
The copy link button when the new form is opened is supposed to give you a link to the new form so that you can link it to a button on a page if you want. I have used this before for other sites but when I try it now the copy link doesn't return anything.