Problem with connection

Yesterday we tried to make a connection, I from my mac - I tried both from safari and firefox - and another person from her iPhone. I have a link ja created that I always use with that person. I copied her in my browser, I sent it to her so that she could access it from her iphone but I told her that she was alone in the meeting.
This had happened to us sometime and we had solved it by closing the browser window and accessing it again, but yesterday it did not work.
Anyone know what might be happening?
Thank you