How to integrate pivot plugin with kibana 7.5.1 i.e. new version of ELK stack

Hi,
 
I am trying to add flexmonster kibana pivot plugin with elk stack 7.5.1 (The latest one).
I got the code form https://github.com/flexmonster/pivot-kibana
and forked it and perform below modification in package.json
 
"kibana": {
"version": "7.5.1",
 
and follow all the steps given so now I can see the pivot page with logo but not the content of the page.
In console I got below error.
 
:5601/built_assets/dlls/vendors.bundle.dll.js:435 TypeError: es is not a function
at :5601/bundles/flexmonster_pivot.bundle.js:8
at processQueue (:5601/built_assets/dlls/vendors.bundle.dll.js:435)
at :5601/built_assets/dlls/vendors.bundle.dll.js:435
at Scope.$digest (:5601/built_assets/dlls/vendors.bundle.dll.js:435)
at Scope.$apply (:5601/built_assets/dlls/vendors.bundle.dll.js:435)
at done (:5601/built_assets/dlls/vendors.bundle.dll.js:435)
at completeRequest (:5601/built_assets/dlls/vendors.bundle.dll.js:435)
at XMLHttpRequest.requestLoaded (:5601/built_assets/dlls/vendors.bundle.dll.js:435) "Possibly unhandled rejection: {}"
On looking at logs I didn't find anything which tell me the real reason for the problem.
In kibana plugin list its is showing ready and all other features of kibana are working fine.
Let me know do I need to define elasticesearch hostname inside anywhere ? because localhost is not allowed in our network. I have gone through the code in line 435 but that has no problem which i can understand.
Please help to fix the issue its bit urgent.
 
Thanks in advance,
Pankaj