After login into splunk search head server while opening the ES App get the error as:
404 page not found
Return to splunk home page
Page not found!
View more information about your request id ="...." in search
your logged into splunk server-name:8000, which is connected to splunkd @....... at https://127.0.0.1:8089 on Tue Mar 19 14:23:11 2019
It would be helpful if any resolution steps to resolve the issue
Have you followed the described procedure in the docs how to setup Splunk ES? Did you follow the instructions on the setup page?
What you usually don't want to do, is, install Splunk, install Splunk ES and start directly without a plan.
Create a new user with the same permissions as people with the problems are using and try the ES app. Maybe set a different home app to see if you can switch to ES then (or if you can see it at all). If not, it's most likely a permission problem.