for more details you also can use splunk metadata command ..
| metadata type=hosts index=_internal | where host="" | convert ctime(firstTime) ctime(lastTime) ctime(recentTime)
in result you will get the status of your splunk instance.
Try this on SH GUI
You will see info regarding your host
On the left side of SH GUI you will see log_level field in which you will see error ,info and warning regarding your host so you can troubleshoot further.