Cannot create root site in newly configured SP2013 farm

Question

I just finished running the configuration wizard and built the sp2013 farm. I then created the web application and now I am trying to create the root site in the web application.
But on browser it says "Something went wrong. user cannot be found"
In ULS Log there is an exception
Application error when access /_admin/createsite.aspx, Error=User cannot be found.   at Microsoft.SharePoint.Administration.SPSiteCollection.Add(SPContentDatabase database, SPSiteSubscription siteSubscription, String siteUrl, String title, String
description, UInt32 nLCID, Int32 compatibilityLevel, String webTemplate, String ownerLogin, String ownerName, String ownerEmail, String secondaryContactLogin, String secondaryContactName, String secondaryContactEmail, String quotaTemplate, String sscRootWebUrl,
Boolean useHostHeaderAsSiteName, Boolean overrideCompatibilityRestriction)     at Microsoft.SharePoint.Administration.SPSiteCollection.Add(SPSiteSubscription siteSubscription, String siteUrl, String title, String description, UInt32 nLCID,
Int32 compatibilityLevel, String webTemplate, Strin... 5a89e89b-cf23-0000-7132-bd7bab5593a4
...g ownerLogin, String ownerName, String ownerEmail, String secondaryContactLogin, String secondaryContactName, String secondaryContactEmail, Boolean useHostHeaderAsSiteName)     at Microsoft.SharePoint.ApplicationPages.CreateSitePage.BtnCreateSite_Click(Object
sender, EventArgs e)     at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument)     at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) 5a89e89b-cf23-0000-7132-bd7bab5593a4
Microsoft.SharePoint.SPException: User cannot be found.    at Microsoft.SharePoint.Administration.SPSiteCollection.Add(SPContentDatabase database, SPSiteSubscription siteSubscription, String siteUrl, String title, String description, UInt32 nLCID,
Int32 compatibilityLevel, String webTemplate, String ownerLogin, String ownerName, String ownerEmail, String secondaryContactLogin, String secondaryContactName, String secondaryContactEmail, String quotaTemplate, String sscRootWebUrl, Boolean useHostHeaderAsSiteName,
Boolean overrideCompatibilityRestriction)     at Microsoft.SharePoint.Administration.SPSiteCollection.Add(SPSiteSubscription siteSubscription, String siteUrl, String title, String description, UInt32 nLCID, Int32 compatibilityLevel, String
webTemplate, String ownerLogin, String owner... 5a89e89b-cf23-0000-7132-bd7bab5593a4
val it: unit=()

Answer 1

Please check following:
1) Any UPN change in your organization
2) Any authentication changes on Web Application: if you switched between NTLM to Kerb.
3) Check if User Profile Service is able to connect to AD/DC.
4) PeoplePicker: What is your peoplepicker doing.
5) Check SuperUser/Reader accounts are properly set.
6) See if blobcache is setup correctly
In my case, I had issue with PeoplePicker. How would you know? Open Manage Web Applications, select a web application and select User Policy. Try to add a domain user there and see if it resolves user name. If not then this means users who are trying to
create their mysites are having one of above mentioned issues.