Error 601 no corresponding activity was found

please help me
this is my problem -"error 601 no corresponding activity was found"

Please download and post each of those event block(s)/procedures here ...
(sample video)

Also see
https://community.appinventor.mit.edu/search?q=youtube

and

For the first url use a webviewer
For the second use a webviewer or an image component to display the image

Taifun

Where is action defined?

please help me I am getting errors again and again of 601, I trying to run my app in nox emulator


here is the screenshot

try it on an Android device
Taifun