I've tried changing the path as you requested to this /storage/emulated/0/Pictures/_app_inventor_image_picker/picked_image441423305.jpg
What I've done is used the ImagePicker.Selection block and put it on the label and then used it as the path, that way I can see what the path is written as.
but you left out the file:// at the beginning. Why ?
We are now at post #44 and still talking about the same (supposed) problem.
I think everything that needs to be said has been said.
Have you setup all your properties correctly ?
If you are about to give up with this extension, you may want to try using the web component?
https://ai2.metricrat.co.uk/guides/firebase-with-a-web-component/firebase-demo-no-security-with-web-component#h.8fpv5p1bmdcp
(Scroll to The Firebase Storage URL requirements section)
