When i try to write in A text string the keyboard opens for just a small moment and crashes

Whenever i try to put some value in a text string, keyboard of my mobile phone opens for short moment and gets off automatically therefore i am unable to put values in the text strings.
Is that any solution…??

It is quite common if you do it in mobile browse with more blocks… just try one more time

You mean with a single block…??

No problem with single blocks