No error notice occurs , But don't showing realtime data in my app using firebase database

I want to change the price of my cloth regularly in my online fashion shop app. So I am making my app using firebase realtime database.
But when I try to change value using firebase realtime database, I don’t get the value which I entered for my label text. please help me and say why my data is not changing? Here is the blocks and live app screenshots.


Please show us how you save data to firebase - blocks so someone might help you cause in the above picture I only see that your are calling data from two different database. Also look here

Look if you want to work smoothly create an admin app usinng the same bucket name and firebasio link and Same tag that you kept in main app and then try.

Here is the tags data