Jira Cloud Service Desk Portal - public access lost

[Reapit Service Desk]

Help ...

We had Portal access enabled for clients to enrol and the log in as required to our Portal.  

However, overnight, behaviour has changed that when users click on the link to Portal it transposes it to this 

user/login?destination=portal%2F1

and says they do not have access.  When you then click on Log In , nothing happens.  If I open up to anonymous access, this goes away, but we need people to be able to log cases via an account.

Any ideas, as this has taken our Portal away overnight ...

[Jack Brickey]

Are you on server or cloud? Can you check the url that is presented in project > Channels and verify if it works or not?