How can I fix the script errors?

MIT App Inventor Help
1

I read this. https://puravidaapps.com/inject.php
and I make it same. But it doesn't work. What is the problem?

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I test his project, it is perfect working. But not mine

2

Is that you made manually from the first?

3

Maybe you should try this project :
inject.aia (2.5 KB)
:grin: :+1:

4

and why did you make 2 topics for it

5

yes
I did it myself