How to use custom method to get tag tree browser selected field value?

I have attached my window. can you please check drag and drop is not working for power table.. i am not getting any error
Metriks_Dev_2022-09-27_1755.zip (13.3 KB)

Hi @lrose

could you get some free time to look in to my project file. can you please let me know what’s wrong in my script