When you log off from the Citrix StoreFront and try to re-login through the same browser, an error message You cannot log on at this time is displayed. This occurs when you log on to Citrix StoreFront on the same browser where the application has been logged off earlier.
As a solution, perform the following steps:
Navigate to C:\inetpub\wwwroot\Citrix\<StoreWeb>\custom\script.js.
Add a command CTXS.allowReloginWithoutBrowserClose = true to enable StoreFront Allow re-login without browser close.
This allows you to re-login to the Citrix StoreFront without closing the browser.