404 error shown to participants

I was running my study to participants, but whenever they clicked my link it showed a 404 error. I’ve run the study on my computer and on different browsers and it works okay - why would this be happening & how can I fix it?

Are you sending your participants the edit link instead of the running link.

Please could you post the link here?

Nevermind I fixed it - had to fork the project to a new group and send participants that link instead.