Getting himiklab's grid.js Widget for Yii2 working

Anyone had any success using himiklab’s grid.js Widget for Yii2? (first post, so I can’t link to it, just google “yii2 jqgrid”)

When trying to install it through composer, by adding the following line to composer.json - "himiklab/yii2-jqgrid-widget" : "*" - (with minimum stability "stable") and running composer update, I am greeted with a problem message:

I have also tried using @dev and @beta for the jqgrid-widget, to no avail.

A solution reveals itself! Running the following command fixed the problem and allowed me to install the extension properly: