You're right, I cut the application to the bone and saw that if I publish the watermark it disappears.
I didn't do this application but the problem at this point is of a different nature. I will investigate
Thank you

Thanks so it works. I have another question regarding this topic. I have an old web-api application, I followed the example and added the various files for the license. In debug everything works but when I publish it I see the watermark. I can't figure out what's missing to show the runtime license ...

How can I distribute a license of a web-api project in IIS?
By launching the project in debug mode from the development system, the trend watermark is removed while it remains on the server.
I am using TeeChartWebDemo example with Steema.TeeChart.NET.4.2021.8.23 library.
Thamks
Marta

Thanks to your information I succeeded.
Thank you
Marta

We have purchased the new TeeChart for NET Pro Edition license. Through nuget we have installed teechart in an old asp.net project but it works in evaluation mode. This project had Steema TeeChart for .NET 2009 installed How can I install the new license in this project? It is not a Web Forms projec...