issue with link to LFG

I have an LFG page and I placed a link to it in the forum. Some players are able to open it, others cannot, is there anything that could have caused this odd occurence? Here is the link in question:&nbsp; <a href="https://app.roll20.net/campaigns/details/1169384/city-of-candles-a-tale-of-two-worlds" rel="nofollow">https://app.roll20.net/campaigns/details/1169384/city-of-candles-a-tale-of-two-worlds</a>

the detail page only opens for those that are already part of the group. Those that are not will get the unauthorized error. You have to either send them a join link or post your Looking for Player page link.