How can I find and remove a non-existing URL causing a 404 error?

I have noticed majority of links to my website are going to an “all collections” page which I don’t use and its giving 404 error - please can someone advise on how to find this and remove it as all collections are manually set up…

Hello @AliceBoden

Can you give me your Store URL( with pass if your store password is enabled) so I can check it for you?

Kind & Best regards,
GemPages Support Team