We are exploring Nintex Workflow 2013 trial version and it installed successfully.
We configured it as per installation guide i.e. configuring content database , web application activation, site collection features activation etc...
but when we are trying to activating Nintex Workflow 2013 Site Feature , we are getting Invalid license file. error .
Is this cause for nintex workflow option is not displaying in workflow settings ?
Let us know the solution .
yes this is the reason why you don't see the nintex option in workflow settings. You need to upload your license file in the central administration.
If you have already done that, contact nintex support to receive a valid license.