Cannot view chats in a particular group

I am unable to view chats from one group in Spark with a specific computer.
I’ve deleted the files in C:\Users\username\AppData\Roaming\Spark with the computer in question (to wipe Spark profile), but the chat of that particular group didn’t appear.
When I tried logging in with a different computer using the same user ID, it appears fine.

Any help/advice would be much appreciated.