when i drag and drop nothing happens and then the app crashes so i cant move forward :(

Answer 1

Juancho Cordoba take screenshot of that instance when app is crashing and sent the screenshot with descriptions about the problem at [e-mail]
Also send some information about your device type android or iOS so they can get back to you.
They will fixed it.

Answer 2

Juancho Cordoba hello.

Could you explain the issue with more detail?

Also if you mean the Sololearn mobile app. How are you using drag and drop on a phone or tablet?