Running Samples in Eclipse 2021/09

[MiBu84]

I try to run the samples server, but without success.
After importing the project as Maven, I did not have the choice "Run (on) Server".
I followed google and performed the following steps:

1. I installed m2e-plugins. Still no option to run.
2. In project properties, I added under Project Facets the "Dynamic Web Module" (v. 4.0). Run option appears, but when trying to run, I received ""The selection cannot be run on any server""
3. I installed JST Server Adapters and JST Server Adapters Extensions plugins, and configured my Tomcat in "Project Faces/Runtimes". Now, when I try to start this server in the Servers view, I receive many exceptions but I think the main one is: The main resource set specified [D:\Users\burmic1806\eclipse-workspace.metadata.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\java-saml-tookit-jspsample] is not valid

Is there another tutorial how to deploy the sample server? Do you have a hint, what I am doing wrong?
Thank yoh very much!

System Setup:

• Java 11
• Tomcat 9
• Eclipse 2021-09 (4.21.0)