I have upgraded to the latest version of Discourse and when i try to connect to this forum I get a message saying that it is running an old version of Discourse and won’t allow it to be added…
On a device where it has already been added it won’t connect…
Based on what I’m seeing in that thread I linked to the problem persists even in the new point update. From what I’ve read some changes to the forum installation running on the server may be necessary.
Go to iOS Settings -> Discourse and turn off the open in Safari settings. Also, make sure you have version 1.4.1 of the app; it was released earlier today.