Hello Minakshi, 

In addition to the 9.1.0 release, we have also changed the licensing of Ignite UI for Angular product. We have added a "Trial" watermark to the packages that we post on NPM (which are free to use). This topic outlines all the details necessary to remove the watermark and acquire your licensed version. 

Keep in mind that if you are building a commercial product or your license has expired, you will need to acquire a commercial license. This will enable you to use our private npm feed hosted on https://packages.infragistics.com/npm/js-licensed/ for development (without a trial watermark). There you will find the latest versions of the Ignite UI for Angular packages. If you have a valid commercial license, you can use this private feed and you will have access to the full version of Ignite UI for Angular.

Please let me know if you need any further assistance with this matter.

Regards,
Bozhidara Pachilova
Associate Software Developer

My suggestion would be to create a private support case from the Customer Portal - https://account.infragistics.com/support-cases, where we will assist you with your specific issue. 

When creating the support case, please, make sure to add additional information, such as any errors output in the console and anything else relevant that might help point to the root cause of the licensing not coming through.

Best regards,
Bozhidara Pachilova
Associate Software Developer