InfoPath forms is not working and showing the below error message:
The trial period for this product has expired on SharePoint
The SharePoint 2013 was not running under a trail version. The Licence was
SharePoint Server with Enterprise Client Access License
In IIS, I checked the SharePoint Central Administrator Application Pool account. It was SharePoint Farm account.
Run--> inetmgr-->Application Pools--> check the SharePoint Central Administration Identity
As the SharePoint Farm account’ password has been reset recently, I needed to enter the new password:
Run--> inetmgr-->Application Pools--> SharePoint Central Administration --> Advanced Settings--> Identity -> Entered the username and the password again.
To check if the SharePoint Farm account is a member of local administrator group:
Run--> compmgmt.msc --> System Tools -> Local Users and Groups -> Groups -> Administrators ->
Add the SharePoint Farm account to the Administrators group
The InfoPath form still was not running so I ran SharePoint Configuration wizard and it fixed the issue.
The issue is fixed and InfoPath forms are working now.
Hope this is helpful