Apache JMeter load testing

Has anyone been able to use Apache JMeter to load test any Vaadin Application?

I read through the wiki https://vaadin.com/wiki/-/wiki/Main/JMeter%20Testing and many others without success.
I am able to use jmeter proxy to record, but I am not able to enter (or change) the values in a text field and click a button to simulate a user data entry.

If you have any experience in using JMeter to simulate user data entry (many different values) , please let me know.
Much appreciated.