yes , but i never liked to use extensions
but i will see it
right, some extension can make the app impossible to build. Consider make a copy of the project before adding the extension.
Ah ,
its like perfect when tested on phone
None of these flaws found!
But i wonder ...., why is it filled with these problems when in appinventor 
Well , i don't know why but when i created a new project that only contains the webviewer & its code , it works excellent but when tested on another project.. shows the same problem
On Android 10 phones, App Inventor has read-write file handling issues. MIT (Evan) are working on a fix.
ok , thanks for your help @ChrisWard
but once again - i noticed one more thing
it works on redmi without any flaws when on another screen (or project)
Also ,
i have added 3 screens to my app (all for html) and if i say - they look great!
i need to change few blocks on the main screen & add the blocks on the new screen
I don't tested yet how webviewer works on kodular, but you can try webwiewer@kodular:
creator.kodular.io - editor
community:
Ahhh,
Kodular isn't a option
its just scratch & app inventor
Actually this needs to be submitted & app can only be made with scratch & app inventor
but still , thank you very much for your help @GuiM_Haes