Firebase help needed

I have my database set up as in the image
the bucket is “attendance” when I get a list of tags I get the dates back all fine
but when I try to get the value for any of the tags it just says the tag doesn’t exist! why is that

show us the global date

its the date formated as day-month-year , in this case it’s 17-9-2022
the fact that the same global is in the tags list but not found is very weird

I asked screenshot of DO IT… Anyway… see how do i obtain the data


I had the EXACT set up block by block and it for some reason didn’t work for me I just don’t understand!
I got the data as json and made it work but thanks for taking the time to help

Pls cross check, how do you initialize the global variable

it’s sent from another screen as start value