Hi Armand,
Thanks for your update.
We have checked your query with your provided files in our project. We are not able to reproduce the reported issue in our side and server side events are working properly in our ejTreeView
For your reference, we have attached the sample below.
If you still facing the same issue, please let us know the following details.
1. If possible, share your project web.config file to us.
2.Please attached the screenshot of errors if any.
3.Share your machine configuration.
4.In which browser, you have facing the issue.
This will help us to provide the solution at earliest.
Regards,
Karthik R