Cannot see reports for Linux client.

I have two Windows clients and a Linux client, all with backups. The reports for the Windows clients seem to work fine.

However, the reports for the Linux client seem to be broken. Screenshot attached.

I notice that if I go to 'Home', then click on the Linux client name, I get the list of backups, but burp-ui outputs this on the console, which doesn't happen for the Windows clients:

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Exception happened during processing of request from ('::ffff:127.0.0.1', 51313, 0, 0) Traceback (most recent call last): File "/usr/lib/python2.7/SocketServer.py", line 295, in _handle_request_noblock self.process_request(request, client_address) File "/usr/lib/python2.7/SocketServer.py", line 321, in process_request self.finish_request(request, client_address) File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request self.RequestHandlerClass(request, client_address, self) File "/usr/lib/python2.7/SocketServer.py", line 651, in init self.finish() File "/usr/lib/python2.7/SocketServer.py", line 704, in finish self.wfile.flush() File "/usr/lib/python2.7/socket.py", line 303, in flush self._sock.sendall(view[write_offset:write_offset+buffer_size]) error: [Errno 32] Broken pipe