There are several ways to troubleshoot this error.
Your NinjaTrader Machine ID has changed. You can manage your machine ID(s) on your account dashboard. You can find this page at the following link:
You have not downloaded the latest software. You can find the latest NinjaTrader download for your product(s) in the Members Area. You can find this page at the following link:
You need to enter the email address tied to your Affordable Indicators, Inc. account in the bottom of the indicator properties settings. Right click the Chart Window > Indicators > Scroll to the bottom of the indicator properties settings > Under License, Enter your email address > Click OK.
If you are still running into problems please reach out to us by using the help icon in the lower right-hand corner of the site.