Problem with any extension (no such class import error)

[Taifun]

@Erfan_Ghofrani

The error happens in emulator and also USB connection.

another no such class error in the companion app via USB... @ewpatton
try to connect via wifi

see also this thread

Error when using Taifun Tools and USB Connection

It looks like the no such class error after importing an extension more frequently (?) appears while being connected via USB... See also Search results for 'Import extension usb' - MIT App Inventor Community @ewpatton probably it makes sense to investigate, why this happens? My general advice usually is How to avoid runtime errors with the companion app After importing an extension, please restart the companion app. If you like to use an extension on a different screen, in Screen1 additio…

Taifun