Please build the project to find out, that it is working…
to open a file from the assets using the Kodular companion app unfortunately does not work like I prepared the example.. this is because our friends at Kodular had the great idea to use the folder /Makeroid rather than /AppInventor to store the assets for the companion app…
For the companion app you can use an if-then-else block to access a file in the assets as shown in the CopyAsync method of the following example by @bodymindpower
Taifun