Steps to reproduce:
1. Open conversations page https://swat-portal.com/forum/wcf/conversation-list/
2. On the right, start typing a name of someone you had conversations with in the past, and select the name from the menu that appears.
3. Press Submit button.
The page will try to load for a minute or two, and then the following message is displayed:
"The page you are looking for is temporarily unavailable.
Please try again later."
Next line below the message contains a long sequence of hex numbers.
I tried 3 different user names and got this result every time.