why are you still using the replace all block?
Taifun
All Time Error
You need to learn programming logic. @Taifun gave you the solution. You want to do something advanced without first learning the basics. Read the links he posted.
this is your own error from the Parse block
see the documentation Device Utilities - Kodular Docs
use Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools#
store the response content in a label and use the Label.Text for further debugging using Do it
Taifun