issues when using a pre-created link to join the zoom meeting

Hi,

I trying to help a client who uses a pre-created link to invite others to join his meeting every week at an specific time. Apparently, someone else created this link which is being shared with the people that is supposed to joining and every time for the past 4 weeks, the people is not allowed to get in and receives this message: “the host has another meeting in progress” or “waiting for the host to start the meeting”

What the reason for the error could be? Please help.

Thanks.