Participants cannot open the link survey

Hye..1st of all i will really sorry, if this question have asked from someone else before this. But i didnt found it in the forum. I have done survey online, and already test it before forward to others. But when i copied the link and forwrad the link to participants, some of them can open it.But some of them cannot open it. Others than that, sometimes the link can open.but sometimes the link cannot open. is it has something wrong about the setting of the survey.maybe it has limit person to answer it, or limit time to answer it after we shared the link.can someone help me to solve this problem...