It's often safer to use the default NTAuthority\NetworkService account if you're installing Tableau Server for the first time, since this is (almost always) guaranteed to work and can always be changed later.
If you do want to proceed with using SriHarsha-PC\SriHarsha as the Run As account, then take a look at the following link from the Tableau Software Knowledge Base which lists all of the permissions that your chosen account will need in order to run Tableau Server correctly.
Tableau Server Run As account permissions
If that does not provide sufficient information, then create a support request and Tableau Technical Support will try and help resolve the issue.