Splunk Add-on for Check Point OPSEC LEA: After upgrading to Splunk Enterprise 6.4, why does the Manage Connections page keep loading?

I just updated Splunk Enterprise to 6.4, but the GUI for the Checkpoint add-on seems to be broken now. ![alt text][1] It doesn't show any tables but the "loading" icon, see the screenshot. Did anyone fix it already? [1]: /storage/temp/121264-checkpoint.png