I am getting a lot of Internal Server Error 500 with in an App

[keiichilam]

I created an app contain most of the required element include macro, lookup, navigator, UI, savedsearches, etc.  
however, when I switched to the app first :

• go to setting -> macro,  then Splunk with gives me internal server error 500, or
• go to setting -> lookup, Splunk with gives me internal server error 500, or
• go to setting -> menu -> navigation, Splunk with gives me internal server error 500 

if I switch to default search apps first, then go to setting and click the configuration like macro or lookup or menu, then I switch to my project app by drop-down menu,  in this case I can edit the content without getting internal server error 500

The Search head is a 4 members search-head cluster, build on Splunk 8.0.2 Linux on CentOS 7
any clue??

[impurush]

To me, looks like this one is a known issue with Splunk. There might dashboards which don't have a title. Please check and give some title, this issue should be fixed.

[keiichilam]

Checked the dashboard should have the title entered, let me check again next Tuesday.
On the other hand, I checked the error, at the very end it seems to relate to Python 2 & 3 's compatibility.

Maybe upgrade the Splunk Servers to the latest version?