So the Splunk ES and DIFR App our down since there is an issue with our server data center back in Tampa. The team is currently working to get it fixed in the meantime. So, I do apologize for the inconvenience. Praying everything should be fixed by this week and once it is I'll put out a shout here so everyone can see.
*** Update ***
Security and Splunk platforms are back online. Check the below for the new URL's for it since they just got updated.